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 21-inch screen would be how many square inches greater than the area of a square 17-inch screen? Select
A) 2  B) 4  C) 16  D) 38  E) 76
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 21^2/2 - 17^2 /2 = 152 /2= 
<gadget id="calculator">152 /2</gadget>
<output>76</output>
76   Ans 76.
<result>E</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 21-inch screen would be how many square inches greater than the area of a square 17-inch screen?