Question

Suppose the length of the diagonal of this rectangular television screen is 29 inches and the length of the base of the screen is 21 inches.

What is h, the height of the television screen?
A. 25 in.
B. 21 in.
C. 15 in.
D. 20 in.

Answer 1

D. 20 in

Explanation:

Answer 2

You need to use Pythagoras theorem
1. Label the triangle: hypotenuse is 29
Since the hypotenuse is already given we need to subtract the following (because the hypotenuse is the longest side):
h squared = 29 squared - 21 squared
h squared = 841 - 441
h squared = 400
h = squared root of 400
h = 20