Question

Find each of the two equal angles of an isosceles triangle whose third angle is 80 digree

Answer 1

Let the triangle be ABC with AB= AC.

Hence,

angle ABC = angle ACB

By angle sum property,

BAC+ABC+ACB=180*

80*+2ABC= 180*

HENCE,

ABC = ACB = 100*/2

ABC = ACB = 50*