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Find the measures of the indicated angle in the parallelogram


Help Find The Measures Of The Indicated Angle In The Parallelogram class=

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Dey99idn
The internal angles of a parallelogram add to 360 degrees. A parallelogram must have equivalent opposite interior angles. Therefore angles a and c are the same and angles b and d are the same. We now know that angles a and c add to 102 degrees so we do (360-102)/2. Which is 129 degrees for both angles. The answer is 129 degrees for angle b
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