Aim: How do we identify polygons?
April 02, 2012




 Solid Geometry
Solid geometry is the geometry of the 3-dimensional space.
It is called three-dimensional, or 3D because there are three dimensions width, depth and height.

Properties:
Solids have properties, such as
- volume
- surface area

There are two main types of solids, "polyhedra" and "non-polyhedra"

Polyhedra- They must have have flat faces
 - prisms , pyramids , and platonic solids

Non-polyhedra- if any surface is not flat.
- sphere , cylinder and cone

Prisms: A prism has the same cross section all along its path/length.

Cross sections : A cross section is the shape you get when cutting straight across an object.

A prism is a solid with bases that are 2 congruent polygons. The other sides of the prism are called the lateral faces.

A prism is named by the shape of its base.