Trig

   Lindsay has 20 pip cleaners, each measuring 8 inches.     

   She attaches them end to end to build a frame.     

   Determine the greatest area that can be enclosed by the frame.     

   It helps when you know that the area of a     

   rectangle is maximized when it's a square.     

   So use 1/4 of the pipe cleaners for each side of the square.     

   That forms a square that's (5 x 8 = 40) inches on each side.     

   The area of a square =  s² where s is the length of one side.     

   A  =  (40 inches)²  =  1600 in²     

   _.