Question

One angle of a triangle is equal to the sum of other two if ratio between the other two angle is 7:8 find the angle

Answer 1

Answer:

The sum of angle of triangles is 180degree.

let the first angle =x

and remaining angle given in ratio 2:7

so 2nd angle be 2x

3rd angle be 7x

x+2x+7x=180degrees (angle sum property of triangles)

x+9x=180degrees

10x=180degrees

x=180/10

x=18

1st angle =18degrees

2nd angle=2×18=36degrees

3rd angle =7×18=126degrees