Question

If the ratio of two angle is 3 : 7 and sum of both angle is 80 then find both the angles

Answer 1

Answer:

3=30

7=70

let 3:7 be 3x and 7x

he sum of all angles of triangle is 180°.

so,

3x+7x+80=180

10x+80=180

10x=180-80

x= 100/10=10

so,

first angle is 80°

second is 3×10=30°

third is 7×10=70°

80+70+30= 180

Answer 2

Answer:

Let 3:7 be 3x and 7x.

We know that,

The sum of all angles of triangle is 180°.

so,

3x+7x+80°=180°

10x+80°=180°

10x=180°-80°

x= 100°

-------

10

so,

first angle is 80°

second is 3×10=30°

third is 7×10=70°.

80+70+30= 180