Question

2. Solve for b.
(a - 3)

Answer 1

Explanation:

Sum of angles inside triangle is 180

b + (a -3) + 90 =180

b + a - 3 + 90 = 180

b + a + 87 = 180

b + a + 87 -87 = 180-87

b + a = 180-87

b + a = 93

b = 93 -a