Stage 18 · Circles

18.2.3 Central Angle, Arc, and Chord Match One to One

18.2 The Three-Way Conversation Between Angle, Arc, and Chord

Point 3 of 4

18.2.3 Central Angle, Arc, and Chord Match One to One

Core idea

In the same circle, equal central angles ↔ equal arcs ↔ equal chords — the three rise and fall together.

Module goal. Build the equal relationships among a central angle, the arc it faces, and the chord it cuts, so that angle, arc, and chord can all be converted into one another.
eastmath.com · 18.2 The Three-Way Conversation Between Angle, Arc, and Chord · 18.2.3 Central Angle, Arc, and Chord Match One to One