Question

ΔABC at right is an isosceles triangle.
What is the measure of angle B? Show your work.

Answer 1

Bc its an isosceles triangle angle c is also 50 meaning b is 80 bc there is 180 degrees in a triangle.(pretty sure this is right but don’t trust me)

Answer 2

Angle B is 80°

Explanation:

AB and CB side are the same which means their angles are the same as well so you do 50 +50 to get 100. You then do 180 (total measurement of the triangle) subtracted by 100 which will give you 80 for angle B.