Circle Constructions compass
Each sketch is followed by an interactive Java applet.  Try dragging various points in the sketch to explore additional cases. Constructions are made using The Geometer's Sketchpad® software available from
Key Curriculum Press
.
Construct a circle given three points 
Find the center of a given circle
Bisect a given arc
Draw  a tangent to a circle at a given point on the circle
Draw a tangent to a circle from a given point not on the circle

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© 2002 Revised March 2003

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