18.3 The Inscribed Angle Theorem — Seeing the World from On the Circle
Point 1 of 5
18.3.1 What an Inscribed Angle Is
Core idea
Move the vertex onto the rim and make the two sides chords, and you have an inscribed angle — it looks out over the very same arc as a central angle does.
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.
eastmath.com · 18.3 The Inscribed Angle Theorem — Seeing the World from On the Circle · 18.3.1 What an Inscribed Angle Is