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Mathematics 21 Online
OpenStudy (anonymous):

In circle A shown below, m arc BC is 71° and m arc EF is 78°. What is m∡FDE? 35.5° 74.5° 39° 78°

OpenStudy (anonymous):

OpenStudy (mertsj):

The measure of an angle formed by two chords is 1/2 the sum of the intercepted arcs.

OpenStudy (anonymous):

@Mertsj So it'd be 1/2 of 71 +78 ?

OpenStudy (mertsj):

yes

OpenStudy (anonymous):

so 74.5?

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