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10 July, 22:40

A parallelogram has an interior angle measuring 81°. Which MUST also be the measure of an interior angle of the parallelogram?

A) 9°

B) 19°

C) 49°

D) 99°

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Answers (1)
  1. 11 July, 02:11
    0
    D) 99°, interior angles in parallelograms are supplementary meaning they add up to 180°. 180°-81°=99°
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