Trash Can Cover (AR Modeling Challenge)

Topic:
Functions
Students: How can we reconstruct the surface seen (in the screencast below) using only 2 surface equations? Take these clues and see if you can reconstruct this surface in GeoGebra Augmented Reality! Clues: This surface consists of 4 isosceles trapezoids. The shorter base of each trapezoid is 6 units long. The z-axis passes through the center of the square. If all four planes were extended indefinitely, they would intersect at (0,0,5). The projection of any slant edge onto the plane z = 0 lies along one of the lines . The cross section of a blue plane with any plane parallel to the plane y = 0 is a line that has . The cross section of a pink plane with any plane parallel to the plane x = 0 is a line that has .