Help urgent.

In a right-angled triangle, you have to know at least 2 sides, or 1 side and 1 angle to find the other side.

In a right triangle with integer length sides, the hypotenuse has length 39 units. How many units is the length of the shorter leg?

$x^2+y^2=39^2\\x^2+y^2=1521$

sqrt(1521-38^2) = 8.7749643873921221

sqrt(1521-37^2) = 12.3288280059379529

sqrt(1521-36^2) = 15

there you go your short sides are  36 and 15

there is probably only one answer but i have not checked that.

The shortest side is 15units