Central Angle, Inscribed Angle, Circular Segment Angle and Arc
INSCRIBED ANGLE PROPERTY
Analysis 1
Move points A, B or C and compare the angles. What can you notice?
Proof
Demo Preview Guidelines
Change the "steps" selector and observe the proof steps. Did you understand the proof? In case you did not understand the property of the external angle click here and review. Go back to step 0. Move point C downwards. Notice the proof steps. Did you understand the proof? Go back to step 0. Move point C upwards. Notice the proof steps. Did you understand the proof?
Measure of circular segment angle
Analysis 2
Change the position of point C and compare the circular segment angles and the central angle. What can you notice?
Arc
Analysis 3
What is the measure of the angle AEB? and of the angle ADB? Why?