Question

the exterior angles of a triangle are 3y,4y and 5y.find the interior angles of the triangle.

Answer 1

a+b=3y

b+c=4y

c+a=5y

adding all

2(a+b+c)=3y+4y+5y=360

12y=360

y=30

exterior angle are 90. 120. 150

interior angle are =90. 60. 30

Answer 2

Step-by-step

it's tricky but an easy question