(geometry) This zigzag crystal vase has a height of 12 inches. The cross sections parallel to the base are always rectangles tha
t are 5 inches wide by 4 inches long. (a) If we assume the crystal itself has no thickness, what would be the volume of the base?
(b) The crystal is actually half an inch thick on each of the sides and on the bottom. Approximately how much space is contained within the vase?
