Question

How will You Do 15 th Question

Answer 1

let the value of x be 3x and y be 5x

sum of the two interior angles=exterior angle
3x+5x=160°
8x=160°
x=160°÷8
x=20°
the first angle =3x=3*20=60°
the second angle=5x=5*20=100°

hope it helps u

Answer 2

let the unknown angles be x
therefore, A=3x and B=5x
angle C=180°-160°
=20°( linear pair)
angle A+ angle B+angle C=180°(sum of all angles is 180°)
therefore, 3x+5x+20°=180°
6x+20°=180°
6x=180°-20°
6x=160°
x=160°/6
=10