Angles in a Circle
The vertex of an angle can appear on, inside, or outside a circle. How does the location and measure of the vertex angle compare with the measure(s) of the arc(s) it intercepts?
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These activities involve interactive programs whose circles can be manipulated by clicking and dragging points.
Coffee Cup Caustic [ java applet ]
This interactive demonstration shows how light rays bounce off of the side of a coffee cup.
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