1.

The angels of quadrilateral are in ratio 3:5 : 9:13

Answer» LET an ANGLE be x
3x + 5X + 9x + 13x = 30x
30x = 360°
x = 360°/ 30
x = 12°
3x = 12°×3 = 36°
5x = 12°×5 = 60°
9x = 12°×9 = 108°
13x = 12°×13 = 156°


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