Central Angle and Inscribed Angle
Use the slider to change the radius. Does the length of the radius affect the measure of the angles? If so, explain the change.
1. Click and drag the points to create m < CAB = 90 (ok if not exactly 90) 2. Verify the measure of < D is half of < CAB. 3. Click and drag point D. Does the position of point D affect the measures of the arc, central, or inscribed angle? If so, explain the change.