Television sets. What does it mean to refer to a 20-in TV set or a 25-in TV set? Such units refer to the diagonal of the screen. A 20-in TV set also has a width of 16 inches. What is its height?Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice.A. Using radicals, b is exactly The b, up to three decimal places, is approximatelyB. The b is exactly. No approximation is necessary.