The cross section of the right rectangular pyramid would be a rectangle, as slicing parallel to the base of the pyramid would result in a shape with the same dimensions as the base of the pyramid. Since the base of the right rectangular pyramid has 4 equal edges, the cross section would also have 4 equal edges, making it a rectangle.
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I apologize for the incorrect response. If a slice is made parallel to the base of a right rectangular pyramid with 4 equal edges, the resulting cross-section would be a square. Since the base has 4 equal edges, the cross-section would also feature 4 equal sides, making it a square.
