Answers

2016-01-19T06:58:21+05:30
Let the angle be x
so angles will be 5x and 7x
5x +7x = 120 ( exterior angle property)
35x = 120
x= 120/35
x= 3.42 Approx
So 5x=17.1 Approx
7x=23.9 Approx
0
2016-01-19T07:04:38+05:30
We know that exterior angle of a triangle is sum of to interior angles
so,
5x+7x=120
12x=120
x=10
Then 5*10=50
7*10=70
We got two angles
We know that sum of interior angles of triangle is 180
so,50+70+x=180
x=180-120=60
The angles are 50,70,60
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Thanx so much for you help me in this question
Exterior angle is 120
Exterior angle is 120 so one of the interior angle will be 180-120=60
Then 5x+7x+60= 180 ( sum of angle of triangle)  so x=10 then angles will be 5,70,60
5*10=50