1. Pentagonal pyramidIn geometry, a pentagonal pyramid is a pyramid with a pentagonal base upon which are erected five triangular faces that meet at a point (the vertex). Like any pyramid, it is self-dual. The regular pentagonal pyramid has a base that is a regular pentagon and lateral faces that are equilateral triangles. It is one of the Johnson solids (J2).
Read “Pentagonal pyramid” on English Wikipedia
Read “正五角錐” on Japanese Wikipedia
Read “Pentagonal pyramid” on DBpedia
Read “Pentagonal pyramid” on English Wikipedia
Read “正五角錐” on Japanese Wikipedia
Read “Pentagonal pyramid” on DBpedia
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