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A parallelogram has one angle that measures 80° measures of the other three angles in a parallelogram?
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A parallelogram has one angle that measures 80° measures of the other three angles in a parallelogram?

User Muhammad Razib
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Since a parallelogram has two pairs of congruent angles that add up to 360, that means there are two 80 degree angles and two 100 degree angles.
This is because:
2x + 2(80) = 360
x = 100
User Almenon
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