Question

Sarah’s new computer screen is 21 inches wide and the diagonal is 29 inches long. What is the height of the screen?

A.15 in
B.18 in.
C.20 in.
D.28 in.

Answer 1

20 in.

This is also C

Explanation:

Answer 2

a^2 + b^2 = c^2 (qudratic formula)
21^2 + h(height)^2 = 29^2
441 + h^2 = 841
h^2 = 400
h = 20

C