Q. 85.0( 1 Vote )

# If ABCD is a parallelogram with two adjacent angles ∠A = ∠ B, then the parallelogram is aA. rhombusB. trapeziumC. rectangleD. none of these

It is given in the question that,

ABCD is a parallelogram where two adjacent angles A = B

We know that, sum of adjacent angles is 180o

∴∠ A + B = 180o

2 A = 180o

A = 180/2

A = 90o

As, A = B = C = D = 90o

ABCD is a rectangle as all the angles are equal to 90o

Hence, option (C) is correct

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