Question

8. The angles of quadrilateral are in the ratio 1:3:7:9. The measure
(a) 63°
(b) 72°
(c) 81°
(d) none of these​

Answer 1

Step-by-step explanation:

let first angle be X

let second angle be 3x

let third angle be 7 X

& let fourth angle be 9 X

Then, X + 3x + 7x + 9x =360

20x = 360

X = 360/20

X= 18

1st angle= 18°

2nd angle= 3* 18 = 54°

3rd angle= 7* 18= 126°

4th angle= 9*18= 162°

Hope it helps ❤️

Have a good day ❤️