Question

In ∆ABC, C = 90° and BC = AC then what is B = ?​

Answer 1

Answer:

B = 45 °

Step-by-step explanation:

Since AC = BC therefore the triangle is Isosceles Triangle

Hence A = B = 45°

Answer 2

Answer:

B = 45°

Step-by-step explanation:

C = 90° and BC = AC

So, Triangle ABC is a right angled Isosceles triangle

and we know the two angels of isosceles Triangle are equal

let the angel be x

both angels A and B are equal

A + B = x + x = 2x

we know sum of all angels of a triangle is 180°

A + B + C = 180°

A and B are equal replace A by B

B + B + C = 180

2B + C = 180

replace B by it's angel i.e x and C by it's angel i.e 90

2(x) + 90 = 180

2x = 90

x = 45°