Question

the angle a b c and d of quadrilateral ABCD are in the ratio 1 ratio 3 ratio 7 ratio 9 find the measure of each angle is ABCD is a parallelogram? Why. This question was asked to be Adarsh

Answer 1

Heya,
_________
_________
let the angles be x , 3x , 7x , 9x
then,
x +3x + 7x + 9x = 360°
20x = 360°
$x = \binom{360}{?20}$
x = 18°
then,
x = 18°
3x =
$18 \times 3$
x = 54°
7x = 126°
and,
9x = 162°

_________
_________
Ankit