Question

this is last page please give answer of this all questions

Answer 1

11)
let angles of triangle are 2x,3x and 4x

sum of all angle of triangle is 180
therefore
2x+3x+4x=180
9x=180
x=20

hence
1st angle is 40
2nd is 60
3rd is 80

Answer 2

1. angles of a triangle are in the ratio 2:3:4.....

so let X be the common multiple of this ratio .......

so the smallest angle is of 2x
second 3x
and 3rd 4x.....

by the property of a triangle.....

sum of measures of all angles in the triangle is 180° ......

so 2x+3x+4x= 180°......

so 9x= 180°.....

X= 180/9

X= 20°.....

so the 1st angle is 2x= 2*20=40
second angle =3*20=60
third angle=3*20=80........

so the angles are 40,60,80 ...

I hope it will help you......☺