The leg of a right triangle is 3 units and the hypotenuse is 11 units. what is the length, in units, of the other leg of the triangle

Pythagorean theorem (or however it is spelled)

a^2 + b^2 = c^2...where a and b are the legs and c is the hypotenuse

3^2 + b^2 = 11^2
9 + b^2 = 121
b^2 = 121 - 9
b^2 = 112...take the square root of both sides, eliminating the ^2
b = square root of 112
b = 10.58 <=== the other leg of the triangle

The answer is all about the number 4