Question 522898
Perimeter =50
one side = 10
The sum of other 2 sides = 40

let one side be x
other side = 40-x

10^2+(40-x)^2=x^2
100+1600-80x+x^2=x^2

1700=80x
1700/80=x
x=21.25

40-21.25=18.75

The sides are 10, 18.75,21.25 cm

The longest side is always the hypotenuse

Check
10^2+18.75^2=451.56
21.25^2=451.56