Angles Inscribed in a Semicircle - Law of Thales

Angle APB intercepts a semicircle. [br]Drag points A to change the orientation of the semicircle.[br]Drag point P to change the angle. [br]
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Angle APB intercepts a semicircle. [br]Drag points A to change the orientation of the semicircle.[br]Drag point P to change the angle. [br]Does the measure of the angle APB ever change? What might be generalized about an angle that intercepts a semicircle?
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– Trowell, Sandra, Hannah Ingham, Accesscd

Information: Angles Inscribed in a Semicircle - Law of Thales