Question

Look at thee isosceles triangle what angle is B?
(I am so so tired is 2 in the morning)

Answer 1

m∡b = 50°

Explanation:

this is an isosceles triangle so the other base angle also measures 65°

there are 180° in a triangle so m∡b = 180-(65+65) or 50°

Answer 2

Isosceles means the bottom right angle is also 65, so to add up to 180, the final angle (B) must be 50.