The size of a television screen is given as the length of the screen's diagonal. If the screens were flat, then the area of a square 22-inch screen would be how many square inches greater than the area of a square 20-inch screen?
Choose the correct choice from the following options.
A) 2  B) 4  C) 16  D) 42  E) 40
Pythogoras will help here!   let the sides be x and diagonal be d   Then d ^2 = 2x^2   and   Area = x^2   Now plug in the given diagonal values to find x values   and then subtract the areas   Ans will be 22^2/2 - 20^2 /2 = 84 /2= 
<gadget id="calculator">84 /2</gadget>
<output>42</output>
42   Ans 42.
<result>D</result>
The size of a television screen is given as the length of the screen's diagonal. If the screens were flat, then the area of a square 22-inch screen would be how many square inches greater than the area of a square 20-inch screen?