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The Ellipse

For Students 9th - 10th Standards
Good site about the ellipse. The site is very comprehensive and detailed in its explanations
Activity
Math Words

Math words.com: Ellipse

For Students 9th - 10th Standards
Brief definition for ellipse. The standard form for the equation of an ellipse is given also.
Unit Plan
Math Open Reference

Math Open Reference: Ellipses

For Students 9th - 10th
Complete reference source for information on ellipses. Provides definitions and interactive activities that will enhance further explanation.
Activity
Texas Instruments

Texas Instruments: Swinging Ellipses: Plotting an Ellipse

For Teachers 9th - 10th
In this activity, Students can use a motion detector to record the position and velocity of a swinging pendulum. They will plot the data as a velocity versus position phase plot and determine an ellipse that fits it.
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Graphing an Ellipse

For Students 9th - 10th Standards
Dr. Math, in a reply to a student question, mentions a couple of different methods to use to obtain the graph of an ellipse, the doctor details one way by using the known coordinates of a circle.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Identifying Ellipses and Polygons

For Students 3rd - 5th
[Free Registration/Login may be required to access all resource tools.] Students watch a video and then attempt practice problems on identifying ellipses and polygons.
Handout
Analyze Math

Analyze Math: Equation of Ellipse

For Students 9th - 10th Standards
Learners investigate the ellipse equation. The tutorial examines intercepts, foci, sketching ellipses, major axes,and minor axes. Examples with detailed solutions are included.
Lesson Plan
Alabama Learning Exchange

Alex: Ellipse

For Teachers 9th - 10th
This lesson is designed for an Algebra II through Pre-Calculus classes and introduces the conic section- an ellipse. In this lesson students explore an ellipse, the set of points in a plane such that the sum of the distances from each...
Activity
Texas Instruments

Texas Instruments: Ellipse: Locus of Points (Cabri Jr.)

For Teachers 9th - 10th
Ellipse as a locus of points using Cabri Jr.
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Ellipse or Circle? Parametric Equation

For Students 9th - 10th Standards
Dr. Math, in reply to a student question, shows how a specific pair of parametric equations produces a circle as opposed to an ellipse.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Identifying Ellipses and Polygons

For Students 2nd - 4th
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on identifying ellipses and polygons.
Unit Plan
CK-12 Foundation

Ck 12: Analysis: Focal Property of Ellipses

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn the focal property and the standard form for ellipses not centered at the origin. Students examine guided notes, review guided...
Unit Plan
CK-12 Foundation

Ck 12: Analysis: Equation of an Ellipse

For Students 11th - 12th
[Free Registration/Login may be required to access all resource tools.] In this lesson students are provided with an introduction to conic sections and sketching ellipses. Students examine guided notes, review guided practice, watch...
Handout
Math Open Reference

Math Open Reference: Major Minor Axis of an Ellipse

For Students 9th - 10th
Learn about the major and minor axis of an ellipse with this helpful reference tool. Provides a detailed definition examples, and an interactive activity that enhance further explanation. Includes links to related topics.
Activity
Texas Instruments

Texas Instruments: Ellipse: Envelope of Lines (Cabri Jr.)

For Teachers 9th - 10th
Create an ellipse using an envelope of lines with Cabri Jr.
Unknown Type
McGraw Hill

Glencoe Mathematics: Online Study Tool: Self Check Quiz on Ellipses

For Students 9th - 10th
The online assessment exhibits knowledge of advanced mathematical concepts in Trigonometry. The questions evaluate students on the topic of ellipses.
Activity
Purple Math

Purplemath: Completing the Square: Ellipses Equations

For Students 9th - 10th Standards
Demonstrates step-by-step how to complete the square for ellipses and hyperbolas. Includes several charts and graphs for understanding.
Handout
Math Open Reference

Math Open Reference: Foci (Focus Points) of an Ellipse

For Students 9th - 10th
Learn about the foci of an ellipse with this helpful reference tool. Provides a detailed definition and an interactive activity that enhance further explanation. Includes links to related topics.
Activity
Math Words

Math words.com: Foci of an Ellipse

For Students 9th - 10th Standards
The definition for foci for an ellipse is given and the definition for ellipse is given. Also gives a diagram and the equation for an ellipse in standard form.
Activity
University of Illinois

University of Illinois Urbana Champaign: Chickscope Egg Math: Equations for an Ellipse

For Students 9th - 10th
Investigation and discussion of the way "Pin and string construction," works in producing an ellipse. Works through the corresponding equations in a well-ordered way.
Website
National Council of Teachers of Mathematics

The Math Forum: Foci of an Ellipse

For Students 9th - 10th Standards
The question, "If the major and minor axis of an ellipse are given, how do I find the focus points?" is answered at the Math Forum.
PPT
Sophia Learning

Sophia: Finding the Equation for an Ellipse: Lesson 2

For Students 9th - 10th Standards
This lesson explains the steps for how to find the equation for an ellipse given its foci and vertices. It is 2 of 4 in the series titled "Finding The Equation For An Ellipse."
PPT
Sophia Learning

Sophia: Finding the Equation for an Ellipse: Lesson 1

For Students 9th - 10th Standards
This brief lesson shows how to find the equation for an ellipse given its foci and vertices and presents a problem to try. Includes a short quiz. It is 1 of 4 in the series titled "Finding The Equation For An Ellipse."
Handout
National Council of Teachers of Mathematics

The Math Forum: Analytic Geometry Formulas, Ellipses

For Students 9th - 10th Standards
A brief overview from the Math Forum on calculating various measures of segments, like major and minor axes and distance from focus to center, is given. Additionally, equations of ellipse in general and standard forms are listed.

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