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2. Template:Archimedean solids - Wikipedia

   en.wikipedia.org/wiki/Template:Archimedean_solids

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

3. Truncated tetrahedron - Wikipedia

   en.wikipedia.org/wiki/Truncated_tetrahedron

   Given the edge length .The surface area of a truncated tetrahedron is the sum of 4 regular hexagons and 4 equilateral triangles' area, and its volume is: [2] =, =.. The dihedral angle of a truncated tetrahedron between triangle-to-hexagon is approximately 109.47°, and that between adjacent hexagonal faces is approximately 70.53°.

4. Archimedean solid - Wikipedia

   en.wikipedia.org/wiki/Archimedean_solid

   The Archimedean solids. Two of them are chiral, with both forms shown, making 15 models in all. The Archimedean solids are a set of thirteen convex polyhedra whose faces are regular polygons, but not all alike, and whose vertices are all symmetric to each other. The solids were named after Archimedes, although

5. Solid geometry - Wikipedia

   en.wikipedia.org/wiki/Solid_geometry

   A solid figure is the region of 3D space bounded by a two-dimensional closed surface; for example, a solid ball consists of a sphere and its interior. Solid geometry deals with the measurements of volumes of various solids, including pyramids , prisms (and other polyhedrons ), cubes , cylinders , cones (and truncated cones ).

6. List of mathematical shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_mathematical_shapes

   Peak, an (n-3)-dimensional element For example, in a polyhedron (3-dimensional polytope), a face is a facet, an edge is a ridge, and a vertex is a peak. Vertex figure : not itself an element of a polytope, but a diagram showing how the elements meet.

7. Exercise book - Wikipedia

   en.wikipedia.org/wiki/Exercise_book

   The papers in a composition book often have the baseline and cap line printed in blue to aid writing, with a (sometimes red) vertical line for a margin on the left hand of every page. Traditionally, the inside back cover contains a table of the weights and measures of the English ( imperial ) system printed for reference; however, this feature ...