Question

the vertex angle of an isosceles triangle is 120 .find the remaining two Angeles

Answer 1

Since we know that 2 angles must be equal in a isosceles triangle... therefore let them be x ...
therefore 2 angles = 2X
and 2x + 120 = 180
2x = 60 ....x= 30....the rest 2 angles...are 30..

Answer 2

vertex =120
in isosceles triangle 2 angles and sides are equal so let them as 2x
by angle sum property
2x+120=180
2x=180-120
2x=60
x=30
therefore both angles are of 30