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

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(24785) (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 

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