A 29-inch-square tv is on sale at the local electronics store. if 29 inches is the measure of the diagonal of the screen, use the pythagorean theorem to find the length of the side of the screen.

According to the Pythagoras's theorem, The sum of the square of the hypotenuse is equal to the sum of the square of the other two sides.

x^2 + x^2 = (29)^2 = 29 x 29 = 281
   
2x^2 = 841 x^2 = 841/2 = 420.5
   
x = sqrt(420.5) = 20.51 inches