Angle A of parallelogram ABCD is 3 times less than angle D. Find angle A.
| December 11, 2020 | education
the sum of the angles is 360 degrees.
let angle A be X, then angle D is 3X.
the opposite angles are equal, which means
X + X + 3X + 3X = 360
8X = 360
X = 45
angle A = 45 degrees
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