Stage 18 · Circles

18.2.4 Bringing in the Chord's Distance from the Center

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

Point 4 of 4

18.2.4 Bringing in the Chord's Distance from the Center

Core idea

The distance from the center to a chord is its chord-center distance, and the longer the chord the closer it sits to the center — this links angle, arc, chord, and chord-center distance into one chain of cause and effect.

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 · 18.2.4 Bringing in the Chord's Distance from the Center