Q: Why is a rectangle polyhedron not regular polyhedron?

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No.

No, it is not.

Not necessarily. If all faces are equilateral triangles (all edges are equal length) then it is a 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.

The answer depends on the size of the polyhedron, whether or not it is convex and if so, whether or not it is regular.

Related questions

yes it is a polyhedron

It is not a regular polyhedron because it has unequal sides

quadrilateral, 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.

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.

There is not enough information to determine how many faces the polyhedron has (and therefore its name).

No.

No, it is not.

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.

No it isn't a regular polyhedron

Not necessarily. If all faces are equilateral triangles (all edges are equal length) then it is a regular polyhedron.

NO spelling