Geometry Notes: Circles and Arcs
the same as arc length. Facts: A full circle is . A semicircle is . Congruent arcs are two arcs of the same circle (or congruent circles) that have . Congruent central angles intercept congruent angles and vice versa. Arcs that share an endpoint but no other points may be added. Ex: In circle O, and . Find. a. b. c. ................
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