Question

A television is measured by its diagonal. If the height of a 70 inch television is 42 inches, what is the width? ​

Answer 1

Use the Pythagorean theorem:

70^2 = 42^2 + width^2

4900 = 1764 + width ^2

Subtract 1764 from both sides

3136 = width^2

Take the square root of both sides

Width = 56 inches