Solve for x.

Question

A right triangle B-C-A is right angled at C, angle A is x degrees and angle B is 2x degrees.
A.
30

B.
45

C.
60

D.
90

Answer 1

B. 45

Explanation: Since angle B is twice angle A, we have:

2x + x + 90 = 180
3x + 90 = 180
3x = 90
x = 30

Therefore, angle A is 30 degrees and angle B is 2*30 = 60 degrees.