SOLUTION: A 21 inch square TV is on sale at the local electronics store. If 21 inches is the measure of the diagonal of the screen, use the Pythagorean theorem to find the length of the side

Algebra ->  Algebra  -> Quadratic Equations and Parabolas -> SOLUTION: A 21 inch square TV is on sale at the local electronics store. If 21 inches is the measure of the diagonal of the screen, use the Pythagorean theorem to find the length of the side      Log On

Ad: You enter your algebra equation or inequality - Algebrator solves it step-by-step while providing clear explanations. Free on-line demo .
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 480857: A 21 inch square TV is on sale at the local electronics store. If 21 inches is the measure of the diagonal of the screen, use the Pythagorean theorem to find the length of the side of the screen.
Answer by ewatrrr(10682) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A 21 inch square TV is on sale at the local electronics store.

Let x represent the length of the side of the screen

Using the Pythagorean theorem:

  x^2 + x^2 = 21^2

   2x^2 = 441

    x^2 = 220.5

      x = sqrt(220.5) =  14.85in