Inverted Nonagonal Pyramid Small 255×320 Medium 511×640 Large 817×1024 Download TIFF Original 2395×3000 | (201.7 KB) Download EPS Vector 345.4 KB Description Illustration of a hollow right nonagonal pyramid. The base is a nonagon 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, hollow, Inverted, isosceles triangles, nonagon, pyramid, pyramids, right nonagonal, triangle, upside down Galleries Pyramids Source: Florida Center for Instructional Technology Clipart ETC (Tampa: University of South Florida, 2007)