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OpenStudy (brooklynnfaith98):

The sum of 4 interior angles of a pentagon is 402*. Find the measure of the Fifth interior angle ?

OpenStudy (brooklynnfaith98):

will you help me with this @Will.H ?

OpenStudy (sleepyjess):

Hello ^_^ The interior angles of a pentagon add up to 540 degrees. So if 4 angles are 402 degrees, how might we find the 5th?

OpenStudy (will.h):

Nice, how did i miss that

OpenStudy (will.h):

your answer is 540 - 402 = 138 degrees

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