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In the diagram below, AB is a diameter of the circle. If arc CB measures 98 °, find the measure of < ABC.

In The Diagram Below AB Is A Diameter Of The Circle If Arc CB Measures 98 Find The Measure Of Lt ABC class=

Sagot :

In this problem

arc ACB=180 degrees -----> because AB is a diameter

arc ACB=arc AC+ arc CB ----> by addition angles postulate

substitute given values

180=arc AC+98

arc AC=82 degrees

Find out the measure of angle mm by inscribed angle

mm

The answer is option A

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