Question

in a right angle triangle , the two acute angles are in the ratio 4:5 find these angles

Answer 1

Let the common multiple be x
thus,
first acute angle = 4x and second =5x

By angle sum property of triangle,

4x+5x+90=180

9x=90

x=10

the angles are 40°, 50° and 90°

Answer 2

let the angle be 4x,5x
4x+5x+90°=180°
9x +90°=180°
9x=180-90
9x=90
x=90/9
x=10
4x=40
5x=50
this is the solution ....hope it's help you