Question

If to supplementary angles are in the ratio 2:7 find them

Answer 1

supplementary angles are 180.so if they are in 2:7 ratio then
2x + 7x = 180
9x = 180
x = 180 / 9
x = 20
the angles are 40 * and 140 *

Answer 2

7x+2x=180°
9x=180
X=9|180
X=20
1st no.=2×20=40
2nd no.7×20=140