Question

If the adjacent angles A and B of llgm ABCD are in the ratio 7:5, then find all the angles of llgm

Answer 1

Answer:

Let angle A=7x

and angle B=5x

7x+ 5x=180

12x=180

x = 180/12

x = 15

ANGLE A=7x

=7 x 15

=105

ANGLE B= 5x

=5 x 15

=75  

angle C=180-75

=105

D=180-105

=75.