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The adjacent angles of a parallelogram are supplementary. This means that angle A + angle B = 180 deg.Since angle B = 2*angle A, then angle A + 2*angle A = 180 deg ie 3*angle A = 180 deg

so that angle A = 60 deg.

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6y ago
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9y ago

In a parallelogram all of the angles add up to 360, and opposite angles are the same. So by using a simple equation you can determine that angle A is 60, because x + 2x + x +2x = 360.

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Q: In this parallelogram the measure of angle b is twice the measure of angle a What is the measure of angle a?
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