Q13 of 58 Page 18

The sum of two opposite angles of a parallelogram is 130°. Find all the angles of the parallelogram.

Let one of the adjacent angle ∠A = 130°


Therfore other adjacent angle ∠B = x°


Sum of adjacent angles = 180°




∠B =



∠A = ∠C = 130° and ∠D = ∠B =70° [Measure of opposite angles of a parallelogram are equal]


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In a parallelogram ABCD, ∠D= 135°, determine the measure of ∠A and∠B.

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ABCD is a parallelogram in which ∠A = 70°. Compute ∠B, ∠C and ∠D.

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