Question

The hypotenuse of a right triangle is 50 mm long. One leg of the right triangle is 30 mm long. What is the length of the other leg?

twenty millimeters

thirty millimeters

forty millimeters

sixty millimeters

Answer 1

this is a 3,4 5 triangle

using pythagorean theorem and letting the unknown leg = x
50^2 - 30^2 = x^2
(50-30)(50+ 30) = x^2
20 *80 = x^2
1600 = x^2
x = 40