Basic Geometry
Topics
Three‐dimensional objects are the solid shapes you see every day, like boxes, balls, coffee cups, and cans.
Here are some helpful vocabulary terms for solids:
 Base: the bottom surface of a solid object.
 Edge: the intersection of two faces on a solid object. This is a line.
 Face: a flat side of a 3‐dimensional object.
 Prism: a solid object with two congruent and parallel faces.
 Pyramid: a solid object with a polygon for a base and triangles for sides.
Say Hello to the 3D Shapes
Name  Properties  Picture 
Rectangular Prism 
 
Cube 
 
Triangular Prism 
 
Octagonal Prism 
 
Triangular Pyramid, aka Tetrahedron 
 
Square Pyramid 
 
Cylinder 
 
Cone 
 
Sphere 

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