In a geometric diagram A and B are complementary, and they form a straight line with C. If m A=x, m B= (2x), and m C =90, what is the measure of B

Answer 1

Since A and B are complementary angles, their measures add up to 90 degrees. Therefore, we have:

m A + m B = 90
x + 2x = 90
3x = 90
x = 30

Therefore, m B = 2x = 2(30) = 60 degrees.