Area enclosed by an ellipse

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Abstract:: An interactive applet and associated web page that demonstrate the area of an ellipse. The major and minor axes can be dragged and the area is continuously recalculated. The ellipse has a grid inside it so that students can estimate the area and compare the result to the calculated one. The web page has the formula for the area calculation. The web page also has links to other pages defining the various properties of an ellipse and to some ellipse constructions. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

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Rubric	Average Score (3 Points Possible)
Degree of Alignment	3 1
Quality of Explanation of the Subject Matter	3 (1 user)
Utility of Materials Designed to Support Teaching	3 (1 user)
Quality of Assessments	N/A
Quality of Technological Interactivity	3 (1 user)
Quality of Instructional and Practice Exercises	3 (1 user)
Opportunities for Deeper Learning	3 (1 user)

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