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In parallelogram ABCD, angle A is 30° more than angle B. Since A and B are adjacent angles, they add up to 180°.
Find angle A (in degrees).

Class 8Properties of QuadrilateralsGeometry

A115
B210
C95
D105

Step-by-Step Solution

Let

B = x

. Then

A = x + 30. A + B = 180

gives

2 x + 30 = 180

, so

x = 75

and

A = 105

deg.

Answer: D) 105

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