Question

If the adjacent angles of a parallelogram are in the
ratio 2 : 7, then the smaller of the two angles is of
measure
(1) 50º (2) 60º
(3) 20º (4) 40º

Answer 1

Answer-(4)40

let angle be x

2x+7x=180

9x=180

x=180/9=20

2x=20*2=40