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From http://www.etymonline.com/index.php?term=polyhedronpolyhedron1570, from Gk. polyedron, neut. of adj. polyedros"having many bases or sides," from polys "many" (see poly-) + hedra "seat, base, chair, face of a geometric solid," from PIE base *sed- "to sit" (see sedentary).
So, they are many sided geometric solids.
What else can I help you with?
All polyhedrons are prisms or pyramids.?
No. Polyhedrons are any shape with multiple sides. A triangle and a prism are just two different kinds of polyhedrons.
Do polyhedrons have right angles?
not all
What are all the shapes that are not polygons?
They are 3 dimensional objects such a s polyhedrons.
Are all solids polyhedrons?
No, those bounded by only plane faces are but others are not.
Is an empty box a polyhedron. Do polyhedrons have to be solid?
Yes, an empty box is and No, polyhedrons don't have to be.
All polyhedrons are prisms or pyramids.?
No. Polyhedrons are any shape with multiple sides. A triangle and a prism are just two different kinds of polyhedrons.
Are polyhedrons symmetrical?
not all, but some
Do polyhedrons have right angles?
not all
What are all the four sided polyhedrons?
tetrahedrons
What has bases and sides that are polygons?
All polyhedrons.
Are prisims polyhedrons or not polyhedrons?
A prism is a polyhedron.
Is it true that all polyhedrons are cubes?
No. Not even all hexahedrons are cubes.
What are all the shapes that are not polygons?
They are 3 dimensional objects such a s polyhedrons.
What three dimensional figure only contain a polygon?
...All polyhedrons
Are all solids polyhedrons?
No, those bounded by only plane faces are but others are not.
Why do you need polyhedrons?
To study solid objects whose faces are all polygons.
Is an empty box a polyhedron. Do polyhedrons have to be solid?
Yes, an empty box is and No, polyhedrons don't have to be.
