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Resource Name |
Topic (Course) |
Technology |
Type |
$? |
Rating |
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Determining the Uniqueness of ...
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Circles (Geometry) |
Sketchpad |
Activity |
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 [0]
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Are there a certain number of arbitrary points such that there exists a unique circle through them? To explore and conjecture an answer to this question, students will construct circles passing throug...
More: lessons, discussions, ratings, reviews,...
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Kissing Circles
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Circles (Geometry)+ |
Sketchpad |
Activity |
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[0]
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This guided exploration, using Geometer's Sketchpad, examines the properties of tangent circles ("osculating" or kissing circles).
More: lessons, discussions, ratings, reviews,...
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Paper Cup Mathematics
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Circles (Geometry)+ |
Sketchpad |
Lesson Plan |
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[0]
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Imagine a discarded paper cup rolling on its side of a flat surface. What geometric shape does the path of the cup form?
Students investigate this question and begin the activity by experimenting wit...
More: lessons, discussions, ratings, reviews,...
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Spirograph Machine, or Tea cup...
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Circles (Geometry)+ |
Computer |
Lesson Plan |
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[0]
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This lab studies the effects (both mathematical and artistic) of circular motion as points rotate around circles. Interesting things occur when a point moves around a circle as the circle rotates arou...
More: lessons, discussions, ratings, reviews,...
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The Geometer's Sketchpad Equat...
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Circles (Geometry) |
Computer |
Lesson Plan |
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[0]
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This activity guides students to discovering the equation of a circle.
More: lessons, discussions, ratings, reviews,...
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Area of a Circle (Geometry)
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Circles (Geometry)+ |
Flash |
Support Material |
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[0]
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This mini- lesson explains the formula used to calculate the area of a circle.
More: lessons, discussions, ratings, reviews,...
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Circles (Getting Started: Geom...
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Circles (Geometry) |
Flash |
Support Material |
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[0]
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This mini-lesson explains the geometry of circles and the relationship between different parts of the circle.
More: lessons, discussions, ratings, reviews,...
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Circles: Definitions and Formu...
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Circles (Geometry)+ |
JavaScript |
Support Material |
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[0]
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The user reviews circles, terms related to circles, and formulas and equations associated with circles.
More: lessons, discussions, ratings, reviews,...
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Equation of a Circle in Standa...
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Circles (Geometry) |
Flash |
Support Material |
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[0]
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This mini-lesson explains how to obtain and use the standard form of the equation of a circle, as well as how to convert between the standard and general form.
More: lessons, discussions, ratings, reviews,...
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Hypotrochoid
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Circles (Geometry)+ |
Java Applet |
Support Material |
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[0]
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This Math Images page catalogs the hypotrochoid, along with a basic description, mathematical explanations, related links, and references.
More: lessons, discussions, ratings, reviews,...
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Measuring Circles (Geometry)
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Circles (Geometry) |
Flash |
Support Material |
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[0]
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This mini-lesson explains more about measuring circles, including segment lengths and angle measures, as well as using the relationship of circumference to diameter.
More: lessons, discussions, ratings, reviews,...
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Real World Applications - Area...
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Circles (Geometry)+ |
Flash |
Support Material |
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[0]
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This mini-lesson will help you apply your knowledge of area, perimeter, and volume to real-world problems.
More: lessons, discussions, ratings, reviews,...
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The Circle
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Circles (Geometry) |
Computer |
Support Material |
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[0]
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Provides you with the definitions of circle, radius, diameter, and circumference.
More: lessons, discussions, ratings, reviews,...
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Annulus, definition and proper...
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Circles (Geometry) |
Java Applet |
Tool |
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[0]
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A web page and interactive applet show that an annulus is a flat (planar) ring, and can be thought of as a disk with a hole punched out of it.
Applet can be enlarged to full screen size f...
More: lessons, discussions, ratings, reviews,...
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Area of a Circle
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Circles (Geometry) |
Sketchpad |
Tool |
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 [1]
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This is a downloadable Geometer's Sketchpad file that illustrates the source of the area formula for a circle.
More: lessons, discussions, ratings, reviews,...
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Area of a Circle - Math Open R...
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Circles (Geometry)+ |
Java Applet |
Tool |
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[0]
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An interactive applet and associated web page that demonstrate the area of a circle.
A circle is shown with a point on the circumference that can be dragged to resize the circle.
As the circle i...
More: lessons, discussions, ratings, reviews,...
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Area of a Segment of a Circle ...
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Circles (Geometry)+ |
Java Applet |
Tool |
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[0]
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An interactive applet and associated web page that demonstrate the area of a segment of a circle - a part of a circle cut off by a chord.
The applet shows a circle and a segment of that circle, ...
More: lessons, discussions, ratings, reviews,...
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Area of an Annulus - Math Open...
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Circles (Geometry) |
Java Applet |
Tool |
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[0]
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A web page and interactive applet show how to compute the area of an annulus. Text on the page explains that the area is the overall area minus the area of the circular 'hole' in the center. For t...
More: lessons, discussions, ratings, reviews,...
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Areas of Regular Polygons and ...
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Circles (Geometry)+ |
Sketchpad |
Tool |
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 [1]
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Students manipulate the number of sides in a regular polygon, develop a formula relating the area and perimeter of the polygon, and use their result to develop a formula relating the circumference ...
More: lessons, discussions, ratings, reviews,...
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Center-Radius Form
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Circles (Geometry) |
Sketchpad |
Tool |
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[0]
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This is a downloadable Geometer's Sketchpad file that illustrates the source of the center-radius area of a circle formula. Scroll halfway down this page in order to find the link to download this fil...
More: lessons, discussions, ratings, reviews,...
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Circle definition - Math Open ...
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Circles (Geometry) |
Java Applet |
Tool |
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[0]
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An interactive applet and associated web page defining a circle.
The applet shows a circle where the user can drag the center and a point on the circle. The radius line supports the definition
...
More: lessons, discussions, ratings, reviews,...
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Circles
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Circles (Geometry) |
JavaScript |
Tool |
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[0]
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The user reviews circles and the important terms and properties related to circles. After viewing examples, users can interactively practice matching the term with the correct part of the circle.
More: lessons, discussions, ratings, reviews,...
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Concentric Circles - Math Open...
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Circles (Geometry) |
Java Applet |
Tool |
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[0]
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An interactive applet and associated web page that demonstrate the concept of concentricity.
The applet shows two resizeable concentric circles and the common center point. As they are dragged to ...
More: lessons, discussions, ratings, reviews,...
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Construct a circle Through 3 P...
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Circles (Geometry)+ |
Java Applet |
Tool |
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[1]
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An interactive applet and associated web page that demonstrate how to construct the circle that passes through all three given points.
The applet starts with three given points and the user can si...
More: lessons, discussions, ratings, reviews,...
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Draw ellipse with pins and str...
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Circles (Geometry)+ |
Java Applet |
Tool |
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[0]
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An interactive applet and associated web page that provide step-by-step instructions on how to draw an ellipse
using two pins and some string. Not strictly a Euclidean construction, but instruct...
More: lessons, discussions, ratings, reviews,...
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