Answer:
Part A: Rectangle
Part B: Rectangle
Step-by-step explanation:
We are given a rectangular prism as shown.
Part A: After slicing the rectangular prism with a plane parallel to the base, we see that the cross-sectional region will be similar to a rectangle.
Thus, the cross-sectional region is a RECTANGLE.
Part B: After slicing the rectangular prism with a plane perpendicular to the base, we see that the cross-sectional region will be similar to a rectangle.
Thus, the cross-sectional region is again a RECTANGLE.
Hence, for both the parts, the cross sectional plane is a Rectangle.