Question

Find the angle which is equal to;
*its complement
*4/5 of its supplement
*2/3 of its complement

Answer 1

let the angles be x and y
x=90-X
x=4/5 ×180-X
x=2/3×90-X

Answer 2

1 .45
2.x+4/5x=180
9x/5=180
x=180×5/9
×= 100
3.x+2/3x=90
5x/3x=90
x=54