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mathopenref.com

math open reference home page. table of contents.

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Global rank: #399246
Daily visitors: 4.2K
Monthly Visits: 126,023
Pageviews per user: 2.42
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TLD: com
IP Address: 35.215.87.114
Organization: Google LLC
Category: Science and Education >
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Last Updated: 3 day ago
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math open reference home page. table of contents.

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mathopenref.com Trust Score

mathopenref.com is probably legit as the trust score is reasonable. Our algorithm rated mathopenref.com a 90. Although our rating of mathopenref.com is medium to low risk, we encourage you to always vote as the evaluation of the site is done automatically.

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Which Sites are Alternatives & Competitors to mathopenref.com?

Explore the top alternatives and rivals of mathopenref.com in November 2024, and assess their data relating to website traffic, SEO, Web Server Information, and Whois. Refer to the list below for the best competitors of mathopenref.com, and simply click on each one to delve into their specific details.

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Mentioned on Their Website:

  • oercommons.org
    OER Commons

    https://oercommons.org/browse?f.provider=math-open-reference

    This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

  • mathopenref.com
    Equation - Math Open Reference

    https://mathopenref.com/equation.html

    Equation. An equation is a mathematical statement that two things are equal. It consists of two expressions, one on each side of an 'equals' sign. For example: This equation states that 12 is equal to the sum of 7 and 5, which is obviously true. In an equation, the left side is always equal to the right side.

  • patreon.com
    John Page | creating Math reference | Patreon

    https://www.patreon.com/mathopenref

    creating Math reference. $5.38/month. Become a member. Hi. I am John Page, the creator of Math Open Reference. I am so glad you are considering becoming a patron! As a …

  • mathopenref.com
    Parametric Equation of an Ellipse - Math Open Reference

    https://www.mathopenref.com/coordparamellipse.html

    Parametric Equation of an Ellipse. An ellipse can be defined as the locus of all points that satisfy the equations. x = a cos t. y = b sin t. where: x,y are the coordinates of any point on the ellipse, a, b are the radius on the x and y axes respectively, ( * See radii notes below ) t is the parameter, which ranges from 0 to 2π radians.

  • mathopenref.com
    Quadrilaterals (4 sided figures) - Math Open Reference

    https://www.mathopenref.com/tocs/quadrilateraltoc.html

    Definition. Area (Brahmagupta's Formula) Diagonals (Ptolemy's Theorem) Interior Angles. Quadrilaterals (4 sided figures) table of contents.

  • mathopenref.com
    Copying a line segment - Math Open Reference

    https://www.mathopenref.com/constcopysegment.html

    This page shows how to copy a line segment with compass and straightedge or ruler. Given a line segment, this shows how to make another segment of the same length.

  • mathopenref.com
    Subtended angle definition - Math Open Reference

    https://www.mathopenref.com/subtend.html

    Definition: The angle formed by an object at a given external point. Try this Drag the orange dot representing the observer's eye, or the base of the flagpole. Note how the angle subtended by the flagpole to the observer's eye varies with distance. Options. Hide.

  • mathopenref.com
    Triangle incenter, description and properties - Math Open Reference

    https://www.mathopenref.com/triangleincenter.html

    Properties of the incenter. The incenter is the center of the triangle's incircle, the largest circle that will fit inside the triangle and touch all three sides. See Incircle of a Triangle. The triangle's incenter is always inside the triangle. Adjust the triangle above by dragging any vertex and see that it will never go outside the triangle.

  • mathopenref.com
    Triangles - Math Open Reference

    https://www.mathopenref.com/tocs/triangletoc.html

    Triangles. Triangle definition. Interior angles. Exterior angles. Exterior angle theorem. Hypotenuse of a right triangle. Medians of a triangle. Altitudes of a triangle. Midsegment …

  • mathopenref.com
    Tangent to a circle at a point - Math Open Reference

    https://www.mathopenref.com/consttangent.html

    This shows how to construct the tangent to a circle at a given point on the circle with compass and straightedge or ruler. It works by using the fact that a tangent to a circle is perpendicular to the radius at the point of contact. It first creates a radius of the circle, then constructs a perpendicular to the radius at the given point.

  • mathopenref.com
    Coordinates of the vertices of a regular polygon with calculator

    https://www.mathopenref.com/coordpolycalc.html

    Polygon vertex calculator. This calculator takes the parameters of a regular polygon and calculates its coordinates. It produces both the coordinates of the vertices and the coordinates of the line segments making up the sides of the polygon. It is useful to blind users and those who produce material for the sight-impaired.

  • math.stackexchange.com
    geometry - How to find the coordinates of the vertices of a pentagon

    https://math.stackexchange.com/questions/1990504/how-to-find-the-coordinates-of-the-vertices-of-a-pentagon-centered-at-the-origin

    Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.. Visit Stack Exchange

  • mathopenref.com
    Cosine - math word definition - Math Open Reference

    https://www.mathopenref.com/cosine.html

    866. The cosine function, along with sine and tangent, is one of the three most common trigonometric functions. In any right triangle , the cosine of an angle is the length of the adjacent side (A) divided by the length of the hypotenuse (H). In a formula, it is written simply as 'cos'. cos.

  • mathopenref.com
    Cylinder definition and properties - Math Open Reference

    https://www.mathopenref.com/cylinder.html

    A cylinder is a geometric solid that is very common in everyday life, such as a soup can. If you take it apart you find it has two ends, called bases, that are usually circular. The bases are always congruent and parallel to each other. If you were to 'unroll' the cylinder you would find the the side is actually a rectangle when flattened out.

  • mathopenref.com
    Circumcircle of a Triangle - Math Open Reference

    https://www.mathopenref.com/constcircumcircle.html

    The circumcircle of a triangle is the circle that passes through all three vertices of the triangle. The construction first establishes the circumcenter and then draws the circle. circumcenter of a triangle is the point where the perpendicular bisectors of the sides intersect. This page shows how to construct (draw) the circumcircle of a triangle with …

  • mathopenref.com
    Arc Length definition - Math Open Reference

    https://www.mathopenref.com/arclength.html

    The arc length is the measure of the distance along the curved line making up the arc. It is longer than the straight line distance between its endpoints (which would be a chord ) There is a shorthand way of writing the length of an arc: This is read as "The length of the arc AB is 10". The lower case L in the front is short for 'length'.

  • mathopenref.com
    Regular polygon area formula - Math Open Reference

    https://www.mathopenref.com/polygonregulararea.html

    Formula for the area of a regular polygon. 2. Given the radius (circumradius) If you know the radius (distance from the center to a vertex, see figure above): where r is the radius (circumradius) n is the number of sides sin is the sine function calculated in degrees (see Trigonometry Overview) . To see how this equation is derived, see Derivation of regular …

  • mathopenref.com
    About Math Open Reference

    https://www.mathopenref.com/siteabout.html

    The Math Open Reference Project. Mission: A free interactive math textbook on the web. Initially covering high-school geometry. Over the past few years, enormous strides have …

  • mathopenref.com
    Introduction to constructions - Math Open Reference

    https://www.mathopenref.com/constructions.html

    Introduction to constructions. Constructions: The drawing of various shapes using only a pair of compasses and straightedge or ruler. No measurement of lengths or angles is …

  • commonsense.org
    Math Open Reference Review for Teachers - Common Sense

    https://www.commonsense.org/education/reviews/math-open-reference

    Take a look inside 5 images. Pros: Interactive content wrapped in a simple package still delivers with tight, clear wording and digestible math chunks. Cons: Ads can annoy and …

  • mathopenref.com
    Arc - Math word definition - Math Open Reference

    https://www.mathopenref.com/arc.html

    An arc is a portion of the circumference of a circle. In the figure above, the arc is the blue part of the circle. Strictly speaking, an arc could be a portion of some other curved shape, such as an ellipse, but it almost always refers to a circle. To avoid all possible mistake, it is sometimes called a circular arc.

  • mathopenref.com
    Difference of two line segments - Math Open Reference

    https://www.mathopenref.com/constdiffsegments.html

    This construction shows how to create a line segment whose length is the difference between two given segments. This is very similar to Sum of line segments, except that the second segment is drawn on the other side of the first, effectively subtracting the lengths. The two types of construction (add , subtract) can be combined in any way you like.

  • mathopenref.com
    Parametric Equation of a Circle - Math Open Reference

    https://www.mathopenref.com/coordparamcircle.html

    The parametric equation of a circle. From the above we can find the coordinates of any point on the circle if we know the radius and the subtended angle. So in general we can say that a circle centered at the origin, with radius r, is the locus of all points that satisfy the equations. x = r cos (t)

  • mathopenref.com
    Constructions - Math Open Reference

    https://www.mathopenref.com/tocs/constructionstoc.html

    Constructions. Introduction to Euclidean Construction - tools and rules. Printable constructions worksheets. Lines. Copy a line segment. Sum of line segments. Difference …

  • mathopenref.com
    Perpendicular lines. (Coordinate Geometry) - Math Open Reference

    https://www.mathopenref.com/coordperpendicular.html

    Perpendicular lines. (Coordinate Geometry) When two lines are perpendicular , the slope of one is the negative reciprocal of the other. If the slope of one line is m, the slope of the other is. Try this Drag points C or D. Note the slopes when the lines are at right angles to each other. Options.

  • mathopenref.com
    Points, Lines and Planes - Math Open Reference

    https://www.mathopenref.com/tocs/pointstoc.html

    Parallel lines. Intersecting lines. Concurrent lines. Perpendicular lines. Horizontal lines. Vertical lines. Bisector of a line segment. Perpendicular Bisector of a line segment. Points, Lines and Planes table of contents.

  • colleenyoung.org
    Math Open Reference | Mathematics, Learning and Technology

    https://colleenyoung.org/2011/01/08/math-open-reference/

    John Page describes his 'Math Open Reference' project as a free interactive textbook on the web, initially covering Geometry. The tools include various function …

  • mathopenref.com
    Rotation - math word definition - Math Open Reference

    https://www.mathopenref.com/rotate.html

    57. °. The "rotation" transformation is where you turn a figure about a given point (P in the diagram above). The point about which the object is rotated can be inside the figure or anywhere outside it. The amount of rotation is called the angle of rotation and is measured in degrees. By convention a rotation counter-clockwise is a positive ...

  • mathopenref.com
    Area of a triangle given three sides - Math Open Reference

    https://www.mathopenref.com/heronsformula.html

    Heron's Formula for the area of a triangle. (Hero's Formula) A method for calculating the area of a triangle when you know the lengths of all three sides. Let a,b,c be the lengths of the sides of a triangle. The area is given by: Try this Drag the orange dots to reshape the triangle. The formula shown will re-calculate the triangle's area using ...

  • mathopenref.com
    Area of a trapezoid - Math Open Reference

    https://www.mathopenref.com/trapezoidarea.html

    Area of a trapezoid. The number of square units it takes to completely fill a trapezoid. Formula: Average width × Altitude. Try this Drag the orange dots to move and resize the trapezoid. As the size of the trapezoid changes, the area is recalculated. Options.

  • mathopenref.com
    Right triangle given one leg and hypotenuse (HL) - Math Open …

    https://www.mathopenref.com/consttrianglehl.html

    Corresponding parts of congruent triangles are congruent. 6. m∠BCA = 90°. ∠BCA and ∠BCP are a linear pair and (so add to 180°) and congruent so each must be 90°. We now prove the triangle is the right size. 7. CA is congruent to the given leg L. CA copied from L. See Copying a segment.

  • mathopenref.com
    Dividing a segment into several equal parts - Math Open Reference

    https://www.mathopenref.com/constdividesegment.html

    How to divide a line segment into equal parts with compass and straightedge or ruler. We start with a given line segment and divide it into any number of equal parts. In the applet we divide it into five parts but it can be any number. Using a compass and straightedge, we do this without measuring the line. A Euclidean construction

  • mathopenref.com
    Coordinates of a point - Math Open Reference

    https://www.mathopenref.com/coordpoint.html

    The coordinates of a point are a pair of numbers that define its exact location on a two-dimensional plane.Recall that the coordinate plane has two axes at right angles to each other, called the x and y axis.The coordinates of a given point represent how far along each axis the point is located. Ordered Pair The coordinates are written as an "ordered pair" …

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DNS Lookup

DNS entries, such as A, NS, MX, and TXT records, are crucial for the functioning of the Internet. The A record maps a domain name to an IPv4 address, while the NS record specifies authoritative name servers for a domain. The MX record identifies the mail server responsible for receiving email messages for a domain. Additionally, the TXT record allows for the association of any text information with a domain name. These records play a vital role in ensuring proper communication and connectivity across the internet.

HostClassTTLTypeData
mathopenref.comIN3879Aip: 35.215.87.114
mathopenref.comIN86400NStarget: ns2.siteground.net
mathopenref.comIN86400NStarget: ns1.siteground.net
mathopenref.comIN86400SOAmname: ns1.siteground.netrname: dnsadmin.serv01.c13637.sgvps.netserial: 100179refresh: 86400retry: 7200expire: 3600000minimum-ttl: 86400
mathopenref.comIN86400MXtarget: mx30.antispam.mailspamprotection.compri: 30
mathopenref.comIN86400MXtarget: mx20.antispam.mailspamprotection.compri: 20
mathopenref.comIN86400MXtarget: mx10.antispam.mailspamprotection.compri: 10
mathopenref.comIN14400TXTtxt: v=spf1 +a +mx +ip4:35.215.87.114 include:_9fc2783fa40dc1cf747af3f307f03c6a.spf.dnssmarthost.net ~all

mathopenref.com Traffic Analysis

According to global rankings, mathopenref.com holds the position of #399246. It attracts an approximate daily audience of 4.2K visitors, leading to a total of 4313 pageviews. On a monthly basis, the website garners around 126.02K visitors.

Daily Visitors4.2K
Monthly Visits126.02K
Pages per Visit2.42
Visit Duration0:01:5
Bounce Rate71.41%
Want complete report?Full SEMrush Report >>
Daily Unique Visitors:
4200
Monthly Visits:
126023
Pages per Visit:
2.42
Daily Pageviews:
4313
Avg. visit duration:
0:01:5
Bounce rate:
71.41%
Monthly Visits (SEMrush):
128479

Traffic Sources

SourcesTraffic Share
Social:
0.79%
Paid Referrals:
4.30%
Mail:
0.00%
Search:
68.74%
Direct:
26.18%

Visitors by Country

CountryTraffic Share
United States:
49.38%
Ireland:
5.71%
Canada:
4.80%
Indonesia:
4.55%
Philippines:
4.47%

SSL Checker - SSL Certificate Verify

An SSL certificate is a digital certificate that ensures a secure encrypted connection between a web server and a user's browser. It provides authentication and encryption to keep data private and protected during transmission. mathopenref.com supports HTTPS, demonstrating their commitment to providing a secure browsing experience for users.

name
*.mathopenref.com
hash
f80fb1b5
issuer
Let's Encrypt
version
2
serialNumber
318999169998203230995102178059843507655936
validFrom_time_t
1716032279
validTo_time_t
1723808278
signatureTypeSN
RSA-SHA256
signatureTypeLN
sha256WithRSAEncryption
signatureTypeNID
668
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
22:B2:2A:0A:85:18:D8:8F:1D:9B:7E:AA:9D:02:A7:CF:EA:38:C5:F9
authorityKeyIdentifier
keyid:14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
OCSP - URI:http://r3.o.lencr.org CA Issuers - URI:http://r3.i.lencr.org/
subjectAltName
DNS:*.mathopenref.com, DNS:mathopenref.com
certificatePolicies
Policy: 2.23.140.1.2.1

HTTP Headers

HTTP headers are additional segments of data exchanged between a client (e.g. a web browser) and a server during an HTTP request or response. They serve to provide instructions, metadata, or control parameters for the interaction between the client and server.

Status
HTTP/1.1 200 OK
Server
nginx
Date
Wed, 29 May 2024 00:48:36 GMT
Content-Type
text/html
Content-Length
10805
Connection
keep-alive
Vary
Accept-Encoding
Last-Modified
Mon, 10 Jan 2022 22:10:20 GMT
ETag
"2a35-5d5419a33a55d"
Accept-Ranges
bytes
Vary
Accept-Encoding
X-Httpd
1
Host-Header
8441280b0c35cbc1147f8ba998a563a7
X-Proxy-Cache-Info
DT:1

Where is mathopenref.com hosted?

mathopenref.com is likely hosted in various data centers located across different regions worldwide. The current data center mentioned is just one of many where the website may be hosted.

Whois Information

WHOIS protocol used to get domain/IP info. Common for reg details, ownership of a domain/IP. Check mathopenref.com for reg/admin contact info, owner, org, email, phone, creation, and expiration dates.

Domain Updated Date:
Domain Created Date:
Domain Expiry Date:
Domain Name:
Registrar WHOIS Server:
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Registrar:
Domain Owner:

N/A.

SEO Analysis

SEO analysis involves examining the performance of a website, including titles, descriptions, keywords, and website speed. It also includes identifying popular keywords and researching competitor websites to understand their strategies. The analysis aims to optimize the website's visibility and improve its ranking on search engines.

Title Tag:

Length: 0 characters

Title tags are usually best kept short, within 50-70 characters. It's important to note that search engines will typically read the entire title tag even if it exceeds 70 characters, but there is a chance they may cut it off or disregard it.

Meta Description:
Math Open Reference Home page. Table of Contents.

Length: 49 characters

When crafting website descriptions, keep in mind that search engines only show the first 150-160 characters in search results. To ensure your entire description is visible, aim for a length of 25-160 characters. If your description is too long, it may get cut off. Conversely, if it's too short, search engines may add text from elsewhere on your page. Additionally, search engines may modify the description you provide to better match the user's search intent. It's best to strike a balance between brevity and relevance for optimal visibility.

Meta Keywords:
  • home
  • contents

In the realm of search engine optimization, the meta keywords tag has become a relic of the past due to its potential for misuse, ultimately leading major search engines to disregard it in their ranking algorithms.

Keywords Cloud:
Term Count Density
geometry 6 4.69%
math 5 3.91%
table 4 3.13%
trigonometry 4 3.13%
contents 4 3.13%
reference 4 3.13%
open 4 3.13%
equations 4 3.13%
introduction 3 2.34%
lines 3 2.34%
calculus 3 2.34%
polygons 3 2.34%
index 3 2.34%
ellipses 2 1.56%
points 2 1.56%
planes 2 1.56%
function 2 1.56%
plane 2 1.56%
triangles 2 1.56%
solving 2 1.56%
subject 2 1.56%
solid 2 1.56%
coordinate 2 1.56%
constructions 2 1.56%
circles 2 1.56%
explorer 2 1.56%
angles 2 1.56%
functions 2 1.56%

A crucial factor in search engine optimization is keyword density, which refers to the proportion of a particular keyword present in the text of a webpage. In order to achieve high rankings on search engine results pages, it is essential to maintain the appropriate keyword density for your primary keyword.

Image Alt Attribute:
9 images found in your page, and 9 images are without "ALT" text.

What is the issue about?
The tag does not have an ALT attribute defined. As a general rule, search engines do not interpret the content of image files. The text provided in the attribute enables the site owner to provide relevant information to the search engine and to the end user. Alt text is helpful to end users if they have images disabled or if the image does not properly load. In addition, the Alt text is utilized by screen readers. Make sure that your Alt text is descriptive and accurately reflects what the image represents and supports the content on the page.

How to fix?
Use the <img alt> attribute to write descriptive content for the image: <img source='pic.gif' alt='Accurate and descriptive keyword text that represents the image.' />.

Website Speed Test (Desktop):
0.02 seconds

Website speed is a measurement of how fast the content on your page loads. Website speed is one of many factors involved in the discipline of search engine optimization (SEO), but it is not the only one. In a recent study, the average load time for a web page was 3.21s.

Top Organic Search Terms:
Term Search Volume Traffic Traffic (%)
mathopenref 70 0 0%

CO-Hosted

CoHosted refers to a situation where multiple domain names (websites) are using the same IP address to point to their respective web servers. They could be owned by different individuals or organizations and may serve entirely different purposes.

mathopenref.com

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Very positive reviews

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Average score: 5 stars

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