Space
figures are figures whose points do not all lie in the same plane. In this unit,
we'll study the polyhedron,
the cylinder,
the cone,
and the sphere.
Polyhedrons
are space figures with flat surfaces, called faces,
which are made of polygons.
Prisms and pyramids
are examples of polyhedrons.
Cylinders, cones,
and spheres are not polyhedrons, because they have curved, not flat, surfaces.
A cylinder has two parallel, congruent bases
that are circles. A cone has one circular base and a vertex
that is not on the base. A sphere is a space figure having all its points
an equal distance from the center point.
Move
your mouse cursor over each type of space figure to learn more.