18.3.3 Inscribed Angles on the Same Arc Are All Equal
18.3 The Inscribed Angle Theorem — Seeing the World from On the Circle
Point 3 of 5
18.3.3 Inscribed Angles on the Same Arc Are All Equal
Core idea
Wherever you stand along the rim to view a given arc, the angle looks the same size, because each one is half of that single central angle.
Module goal. Introduce the inscribed angle, with its vertex on the circle, and establish its half relationship with the central angle plus a run of corollaries — this is the heart of the stage.
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