What is the hypotenuse of a right triangle if the legs are each 20 inches long? Round to the nearest whole number. A. 28
B. 29
C. 30
D. 31

A

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse h is equal to the sum of the squares on the other 2 sides, that is

h² = 20² + 20² = 400 + 400 = 800 ( take the square root of both sides )

h = ≈ 28 in ( to the nearest whole number )