Answers

2014-10-25T23:01:19+08:00
Using Pythagorean Theorem where the square of the hypotenuse is equal to the sum of the square of the legs
c² = a² + b²
having 3 as the length of 1 leg and 5 as the length of the hypotenuse you'll have
5² = 3² + b²
5² - 3² = b²
25 - 9 = b²
16 = b²
b = 4
therefore the length of the other leg is 4 units
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