Question 934412
isosceles triangle ----has 2 equal sides and  2 angle are equal

given angle are  2x and 5x 

we can say that the obttuse angle is 5x 

so the third angle is 2x also 

2x+5x+2x=180

x=20

2x=40
5x=100

note the total angle of a triangle is 180 degree