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3D Topicscape is a Personal information manager that provides a template loosely based on mind-mapping or concept mapping. It presents the mind map as a 3D scene [1] where each node is a cone (or pyramid, or variation on such a shape). It can also display in a 2D format.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
the dihedral angle of an elongated pentagonal bipyramid between square-to-triangle is the sum of the dihedral angle of a pentagonal pyramid between triangle-to-pentagon with that of a pentagonal prism between square-to-pentagon, 37.38° + 90° = 127.38°. The dual of the elongated square bipyramid is a pentagonal bifrustum.
The tetrahedron is one kind of pyramid, which is a polyhedron with a flat polygon base and triangular faces connecting the base to a common point. In the case of a tetrahedron, the base is a triangle (any of the four faces can be considered the base), so a tetrahedron is also known as a "triangular pyramid".
A dodecagonal pyramid is a pyramid with a dodecagonal base. It is a type of tridecahedron, which has 13 faces , 24 edges , and 13 vertices , and its dual polyhedron is itself. [ 5 ] A regular dodecagonal pyramid is a dodecagonal pyramid whose base is a regular dodecagon.
Template documentation Although expanded here, this template is collapsed when transcluded . Editors can experiment in this template's sandbox ( create | mirror ) and testcases ( create ) pages.
Comparison of approximate profiles of the Comparison of pyramids.svg with some notable pyramidal or near-pyramidal buildings. Dotted lines indicate original heights, where data is available. In its SVG file, hover over a pyramid to highlight and click for its article.