Question

in an isosceles triangle,the base angles are equal the vertex angle is 50 what are the base angles

Answer 1

z=80 (vertex angle)
x+y+z=180 (Sum of angles of any triangle is always 180)
x+x+z=180 (isosceles triangle, base angles are equal)
Substitute z=80

x+x+80=180
2x=100
x=50
Ans:Base angles are 50 each
Check:50+50+80=180

Answer 2

the correct answer is 65 each