Question

The difference between the two acute angles of a right-angled triangle is 2(pie)/5 radians. Express the angles in degrees?? How to Solve it

Answer 1

2π/5 radians = 72°

so let one angle be x
then the other is x+72

we know x + x+72 = 90
2x = 18
x = 9

So the two angles are 9° and 81°

Answer 2

x+9+81=90
x+90=90
x=90-90
x=o