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The horizontal cross section of a triangular pyramid, or tetrahedron, is a shape that varies depending on the height at which the section is made. At different heights, the cross section will be a triangle, with its size and proportions changing as you move up or down the pyramid. If the section is made at the base, the cross section will equal the triangular base itself, while sections taken higher up will be smaller triangles. The shape remains triangular throughout, but its dimensions shrink as you ascend towards the apex.

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1w ago

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