Question

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.

Answer 1

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