Question

please answer this question this the last question of my homework ​

Answer 1

5x-21=x+75 (opposite angles of a parallelogram are equal.)

4x=96

x=24

first angle=5x-21=120-21=99

second angle=x+75=24+75=99

let us take other two angles as y

99+99+y+y=360 (angle sum property )

2y=162

y=81

therefore the third and fourth angles are 81 each.