Bipyramid
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An n-gonal bipyramid or dipyramid is a polyhedron formed by joining an n-gonal pyramid and its mirror image base-to-base. The referenced n-gon in the name of the bipyramids is not an external face but an internal one, existing on the primary symmetry plane which connects the two pyramid halves. The face-transitive bipyramids are the dual polyhedra of the uniform prisms and will generally have isosceles triangle faces. A bipyramid can be projected on a sphere or globe…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An n-gonal bipyramid or dipyramid is a polyhedron formed by joining an n-gonal pyramid and its mirror image base-to-base. The referenced n-gon in the name of the bipyramids is not an external face but an internal one, existing on the primary symmetry plane which connects the two pyramid halves. The face-transitive bipyramids are the dual polyhedra of the uniform prisms and will generally have isosceles triangle faces. A bipyramid can be projected on a sphere or globe as n equally spaced lines of longitude going from pole to pole, and bisected by a line around the equator.