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12-5 Angles formed by chords, secants, and tangents

ON THE CIRCLE: Measure of angle B= 1/2(measure of arc BC. Arc divided by 2.

IN THE CIRCLE: Measure of angle AEB=1/2(measure od arc AB+ measure of arc DC). Add 2 arcs and divide by 2.

OUTSIDE THE CIRCLE: Measure of angle A=1/2(measur eof arc BC-measure of arc DE). Subtract the 2 arcs and divide by 2.

Problem 1-1