【单选题】The figure above represents a window, with the shaded regions representing openings for glass and the pale regions representing the wood panels between and around the glass. If the window is 4.5 feet ...
【简答题】In the rectangular figure above, the area of the shaded region is equal to the area of the non-shaded rectangle. If AB=6, BC=4, and the longer side of the non-shaded rectangle is an integer, what is o...