Describe the two-dimensional shape made by slicing a rectangular prism vertically, perpendicular to the base.
A. triangle
B. rectangle
C. square
D. hexagon
B. rectangle
When a rectangular prism is sliced vertically, perpendicular to the base, the resulting two-dimensional shape is a rectangle. This is because the slice cuts through the prism parallel to the base, creating a cross-section that has the same width as the base of the prism and the same length as the height of the prism.