The Conic Sections in Polar Coordinates
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http://online.redwoods.cc.ca.us/instruct/darnold/MultCalc/PolarConics/conics.htm  


David Arnold; Mathematics Dept., College of the Redwoods, CA  
An interactive study of the polar form of the equation for a conic section, for readers familiar with polar coordinates and triangle trigonometry. This activity is also a vehicle for the introduction of the Geometer's Sketchpad, though no prior experience with the program is assumed. The focusdirectrix definition of the conic section; how to create the basic sketch; finding the eccentricity; computing the radial length; transforming; dynamic geometry (see both branches of the hyperbola traced by dragging a point around the circumference of the circle); locus and animation; and further exploration.  


Levels:  High School (912), College 
Languages:  English 
Resource Types:  Lesson Plans and Activities, Tutorials, Geometer's Sketchpad 
Math Topics:  Conic Sections and Circles, Coordinate Plane Geometry 
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