Question

If ^B = 40*, find ^C

Answer 1

The answer is 50°

Explanation:

B=A(base angles in an isosceles triangle)

B+A+O=180

B+B+O=180

40+40+O=180

80+O=180

180-80=O

O=100

angle at Circumference =1/2angle at centre

C=1/2×100

C=50°