Question

Please solve this question in detail

Answer 1

Let the measure congruent angles of triangle be x
and third angle be y
y=x +30

x+x+y= 180 (sum of all the angles of triangle)
x+x+x+30=180 (substituting value of y)
3x =180-30
3x =150
x =50

y=x+30
=50+30
=80