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Javascript Version

Angles in a Particular Kite

A is the center of the circle and BC and BD are tangents.

By dragging the figure, can you come up with a theorem about angles BAD and BCD?













What do we know about angles ABC and ADC?

Can we use this fact to prove our assertion about BAD and BCD?

If you are interested in this applet, you may like our Interactive Symbolic Geometry software Geometry Expressions.