In triangle ABC, the angle at A is 30° more than the angle at B, and the angle at C is 90°.
Using the angle sum property, find the angle at B.

Question

In triangle ABC, the angle at A is 30° more than the angle at B, and the angle at C is 90°. Using the angle sum property, find the angle at B.

Accepted Answer

30. Let angle B = x. Then angle A = x + 30 and angle C = 90. So (x + 30) + x + 90 = 180, 2x + 120 = 180, 2x = 60, x = 30°.

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