When you make a perpendicular slice through a right rectangular pyramid from the base to the apex, the resulting two-dimensional figure is a triangle.
More specifically, the triangle is formed by cutting through both diagonal corners of the rectangular base and converging at the apex (the top point) of the pyramid. The base of the triangle will be equal to the width of the rectangular base, and the height of the triangle will extend from the base to the apex of the pyramid. This cut essentially creates a vertical cross-section of the pyramid, revealing a triangular shape that represents the relationship between the base and the apex in three-dimensional space.
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