Question

let 'o'be the centre of a circle AB is a diameter then prove that angle ACB=9O DEGREE​

Answer 1

take angle A 45 and and B 45.

A+B+C=180

45+45+C=180

90+C=180

C=180-90

C=90

Answer 2

Take angle A 45 and B 45

A + B + C= 180

45 + 45 + =180

90+C=180

C=180-90

C=90