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Why is a rectangle polyhedron not regular polyhedron?
The sides of a rectangle are not all equal so a rectangle is not a regular polygon. And, as a consequence, any 3-dimensional shape made from rectangles cannot be a regular polyhedron.
Is a decahedron a regular polyhedron?
No.
Is a cylinder a regular polyhedron?
No, it is not.
Is the tetrahedron a regular polyhedron?
Not necessarily. If all faces are equilateral triangles (all edges are equal length) then it is a regular polyhedron.
What is the regular polyhedron?
A regular polyhedron has equal size faces as in the case of a tetrahedron which is a triangular base pyramid that has 4 equilateral triangle faces.
Why decahedron is not a regular polyhedron?
It is not a regular polyhedron because it has unequal sides
What shapes go in the category of irregular polyhedra?
A polyhedron is a plane shape, enclosing a single space, which is bounded by straight lines.If ALL angles and ALL sides are equal, then it is a regular polyhedron. All other polyhedra are irregular.Note that if any of the sides is not straight then the shape is not a polyhedron at all, and so cannot be an irregular polyhedron.A polyhedron is a plane shape, enclosing a single space, which is bounded by straight lines.If ALL angles and ALL sides are equal, then it is a regular polyhedron. All other polyhedra are irregular.Note that if any of the sides is not straight then the shape is not a polyhedron at all, and so cannot be an irregular polyhedron.A polyhedron is a plane shape, enclosing a single space, which is bounded by straight lines.If ALL angles and ALL sides are equal, then it is a regular polyhedron. All other polyhedra are irregular.Note that if any of the sides is not straight then the shape is not a polyhedron at all, and so cannot be an irregular polyhedron.A polyhedron is a plane shape, enclosing a single space, which is bounded by straight lines.If ALL angles and ALL sides are equal, then it is a regular polyhedron. All other polyhedra are irregular.Note that if any of the sides is not straight then the shape is not a polyhedron at all, and so cannot be an irregular polyhedron.
Is a truncated isocahedron a regular polyhedron?
No. It is a semi-regular polyhedron. Explanation. The truncated icosahedron is a polyhedron that can be constructed from an icosahedron with the 12 vertices truncated (cut off) such that one third of each edge is cut off at each of both ends. This creates 12 new pentagon faces, and leaves the original 20 triangle faces as regular hexagons A regular polyhedron is a polyhedron whose faces are congruent regular polygons. The truncated icosahedron is NOT a regular polyhedron, it is a semiregular polyhedron. It is a uniform polyhedron.
Is a sphere a polyhedron?
No, a sphere is not a polyhedron.A polyhedron is a three-dimensional geometric figure whose sides are polygons.A regular polyhedron is a polyhedron whose faces are all congruent regular polygons.
Why is a rectangle polyhedron not regular polyhedron?
The sides of a rectangle are not all equal so a rectangle is not a regular polygon. And, as a consequence, any 3-dimensional shape made from rectangles cannot be a regular polyhedron.
Is a decahedron a regular polyhedron?
No.
Is a cylinder a regular polyhedron?
No, it is not.
Do 20 equal sides form a polyhedron?
No. A polyhedron is 3 dimensional. You have a regular polygon, regular because the sides are equal. If you asked about 20 surfaces, then it would be a polyhedron.
Is a decahedral a regular polygon?
No it isn't a regular polyhedron
Is the tetrahedron a regular polyhedron?
Not necessarily. If all faces are equilateral triangles (all edges are equal length) then it is a regular polyhedron.
Is a prism a regular polyhedron?
yes
Is a regular polyhedron a prism?
NO spelling
