Inverted Septagonal/Heptagonal Pyramid Small 304×320 Medium 608×640 Large 973×1024 Download TIFF Original 2850×3000 | (221.7 KB) Download EPS Vector 338.9 KB Description Illustration of a hollow right heptagonal (septagonal) pyramid. The base is a heptagon and the faces are isosceles triangles. The pyramid is inverted, meaning that the vertex is at the bottom and the base is on top. Keywords geometric solid, heptagon, hollow, Inverted, isosceles triangles, pyramid, pyramids, right heptagonal, septagon, septagonal, triangle, upside down Galleries Pyramids Source: Florida Center for Instructional Technology Clipart ETC (Tampa: University of South Florida, 2007)