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Two adjacent angles A and B of parallelogram ABCD differ by 30°, with angle A the larger.
Find the measure of angle A (in degrees).

Class 8Properties of ParallelogramsQuadrilaterals

A115
B95
C105
D210

Step-by-Step Solution

A + B = 180

and

A = B + 30

. So

(B + 30) + B = 180, 2 B = 150, B = 75. A = 75 + 30 = 105

deg.

Answer: C) 105

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