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</span>The square-shaped slice can be made from a slice parallel to the base of a right
rectangular prism, cube, and right rectangular pyramid with a square base. The triangle-shaped slice and isosceles
trapezoid-shaped slice can be made with a slice made perpendicular to the base
of a right rectangular pyramid. A
pentagon-shaped slice cannot be made from a slice made parallel or
perpendicular to the base of either a right rectangular prism, right
rectangular pyramid, or cube.
The midpoint is the average of the endpoint coords. If (x,y) is F, then -6=(-14+x)/2 and 7=(13+y)/2. -14+x=-12 so x=2, and 14=13+y, so y=1 and F is (2,1). so the answer is (2,1)
