0
A polyhedron is a 3-dimensional shape bounded by 4 or more plane faces. The prefices for the smaller numbers are pretty well known: tetrahedron (4), penta-, hexa-, etc. Beyond 10, the only common prefices are dodeca- (12) and icosa- (20). For most polyhedra with a large number of faces, the sensible and user friendly way is to refer to it as an n-hedron where n is the number of faces. However, some pretentious and user unfriendly people will insist on using unfamiliar prefices. You may find help deciphering these at
http://faculty.kutztown.edu/schaeffe/Tutorials/General/Polygons.html
Add your answer:
Earn +20 pts
Some polyhedrons are both prisms and pyramids.?
Not true.
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.
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.
Do polyhedrons have right angles?
not all
Which of the following are not polyhedrons?
Cone, cylinder.
Are polyhedrons symmetrical?
not all, but some
Some polyhedrons are both prisms and pyramids.?
Not true.
Are prisims polyhedrons or not polyhedrons?
A prism is a polyhedron.
Some polyhedrons are neither prisms nor pyramids?
true
Is it true some polyhedrons are both prisms and pyramids?
true
What are some polyhedrons with 10 edges?
I can just think of the pentagonal pyramid.
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.
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.
Cylinders and cones are just polyhedrons with circular bases?
False. Cylinders and cones are not just polyhedrons with circular bases.
Why aren't cylinder cones and spheres polyhedrons?
polyhedrons need flat face and edges, corners which cylinder cones don't have.
What shapes are the lunar craters?
Polyhedrons
Do polyhedrons have right angles?
not all
