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Ellipse definition and properties

(Complete Item Description)

Abstract:: An interactive applet and associated web page that show the definition and properties of an ellipse. The applet has a draggable point that shows that the sum of the distances to the foci is a constant. 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.

Subject:: Mathematics and Statistics
Grade Level:: Secondary
Collection:: Math Open Reference

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Foci of an ellipse

(Complete Item Description)

Abstract:: An interactive applet and associated web page that show the definition and properties of the focus points (foci) of an ellipse. The applet has an ellipse whose major and minor axes can be dragged. The applet shows the location of the foci, which are always on the major axis, and shows how they move with variation of the axis lengths. The web page also has a formula for calculating the location of the foci. 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.

Subject:: Mathematics and Statistics
Grade Level:: Secondary
Collection:: Math Open Reference

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Get Me Off This Planet

(Complete Item Description)

Abstract:: The purpose of this lesson is to teach the students about how a spacecraft gets from the surface of the Earth to Mars. The lesson first investigates rockets and how they are able to get us into space. Finally, the nature of an orbit is discussed as well as how orbits enable us to get from planet to planet specifically from Earth to Mars.

Subject:: Mathematics and Statistics, Science and Technology
Grade Level:: Primary, Secondary
Collection:: TeachEngineering

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