The size of a television screen is given by the length of its diagonal. what is the size of a television that has a width of 36 inches and a length of 48 inches

You need to use the Pythagorean theorem for this. Take the square root of (48^2 + 36^2). This will give you the length of the diagonal.

48^2 + 36^2 = 3600

Remember we need to take the square root of 3600, which is just 60.

The length of the diagonal is 60 inches.