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Circle equation and arc proportionTechnique

Technique

Circle equation and arc proportion

Read center and radius, then slice arcs by angle

3 min 3 steps

Circle questions run on two reads: the radius from the equation, the slice from the angle. I used to case the bake-sale pie the same way.

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Radius, arcs, tangents, and the equationFactFour facts that run nearly every circle question

Used by

Circle equations, points, and tangentsTacticGet to standard form, then read center and radius
Arcs, sectors, chords, and anglesTacticTurn the central angle into a fraction of the circle