Describe the two dimensional figure that result from making a perpendicular, sliced to a right rectangular pyramid that goes from the base through the Apex

The two-dimensional figure that results from making a perpendicular slice to a right rectangular pyramid that goes from the base through the apex would be a triangle. This triangle would have one right angle where the slice intersects the base of the pyramid, and two acute angles where the slice intersects the triangular faces of the pyramid. The length of the sides of the triangle would vary depending on the dimensions of the base of the pyramid and the angle of the slice.