Question

Find the unknown sizes of a triangle​

Answer 1

2x = 80°

3x = 120°

4x = 160°

Explanation:

Refer the attached file.

Answer 2

`3x^o+4x^o+2x^o=360^o\ \ \ \text{[Sum of exterior angles of a triangle is 360}^o.]\\\text{or, }9x^o=360^o\\\text{or, }x^o=40^o`

`\therefore 2x^o=2(40^o)=80^o,\ 3x^o=3(40)^o=120^o \text{ and }4x^o=4(40^o)=160^o`