Jisho

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かくすい 角錐
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Noun
1. pyramid​
Wikipedia definition
2. Pyramid (geometry)​In geometry, a pyramid is a polyhedron formed by connecting a polygonal base and a point, called the apex. Each base edge and apex form a triangle. It is a conic solid with polygonal base. A pyramid with an n-sided base will have n + 1 vertices, n + 1 faces, and 2n edges. All pyramids are self-dual. When unspecified, the base is usually assumed to be square. If the base is a regular polygon and the apex is above the center of the polygon, an n-gonal pyramid will have Cnv symmetry.
Read “Pyramid (geometry)” on English Wikipedia
Read “角錐” on Japanese Wikipedia
Read “Pyramid (geometry)” on DBpedia
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角すい 【かくすい】

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