Basic Geometry
Topics
Introduction to :
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 

Exercise 1
Fill in the blank with always, sometimes, or never. A prism ____________ has parallel bases.
Exercise 2
Fill in the blank with always, sometimes, or never. A tetrahedron ___________ has 4 equilateral triangles.
Exercise 3
Fill in the blank with always, sometimes, or never. A prism ___________ has 6 faces.
Exercise 4
Fill in the blank with always, sometimes, or never. Two faces on a cone are ___________ parallel.
Exercise 5
Fill in the blank with always, sometimes, or never. In a prism, opposite faces are _________ parallel.
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