18.3.2 The Inscribed Angle Theorem: Half the Central Angle
18.3 The Inscribed Angle Theorem — Seeing the World from On the Circle
Point 2 of 5
18.3.2 The Inscribed Angle Theorem: Half the Central Angle
Core idea
For one and the same arc, the angle you see standing on the circle is always half the angle you see standing at the center — inscribed angle = central angle ÷ 2.
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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