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Circles

GE.G.1Central angles & arcs01/04

Central angles and arcs.

Step01of 04

A central angle has its vertex AT the center of the circle. Its two sides are radii. The arc between those radii has a measure EQUAL to the central angle.

O120°AB
Central angle = arc measure (in degrees).
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GE.G.1 – GE.G.5 · CCSS G.C.A.2 / G.C.B.5 / G.GPE.A.1·Full curriculum →