Question

ABC is an isosceles triangle right angled at B then

Answer 1

AB = BC

angle A = Angle C

if angle b is 90° then,

angle(A+B+C) = 180°

let angle a and c be x

90+x+x = 180°

90+2x = 180

2x = 90

x = 90/2

x = 45°

hence angle A and angle C is 45°