Illustration of a hollow right heptagonal (septagonal) pyramid. The base is a heptagon and the faces…
Illustration of a hollow right heptagonal (septagonal) pyramid. The base is a heptagon and the faces…
Illustration of a right septagonal/heptagonal pyramid with hidden edges shown. The base is a heptagon…
Illustration of a right septagonal/heptagonal pyramid, with hidden edges shown, that has been cut by…
Illustration of a septagonal/heptagonal pyramid that has been cut by a plane parallel to the base. The…