Question

The internal angle of a triangle are in the ratio 3:5:7. Find the size of the angles. Also find the size of its greatest exterior angle.

Answer 1

Step-by-step explanation:

3x+5x+7x=180

15x=180

x=180/15

x=12

3x = 3×12

3x=36

5x=5×12

5x=60

7x = 7×12

7x = 84

exterior angle= sun of two opposite angles

let the three exterior angles be A,B,C

A=36+60

A=96

B=70+84

B=154

C=84+36

C=120

the biggest exterior angle is B=154

Answer 2

Step-by-step explanation:

the biggest exterior angle is angle B because he have 154