Question

Lamar goes shopping for a new flat-panel television. A television is usually described by the length of the screen's diagonal. He finds a great deal on a 42-inch display model. a. If the screen's height is 21 inches, what is the width

Answer 1

The width is 36.4 inches

Explanation:

we know that

Applying teh Pythagorean Theorem

`D^2=h^2+W^2`

where

D is the length of the diagonal of the television

W is the width

h is the height

substitute the given values

`42^2=21^2+W^2`

solve for W

`W^2=42^2-21^2\\W^2=1,323\\W=36.4\ in`