Base

Definition of Base

• Base is the bottom of a plane or a solid.
• In case of trapezoids and  prisms, both the top and bottom are called bases as they are parallel to each other.

                       

More about Base

• The base of a two-dimensional figure is a line.
• The base of a three-dimensional figure is a plane.

                       

Examples of Base

• Two-dimensional : Circle is the base of a cone.
• Three-dimensional : Square is the base of a cube.

         

Solved Example on Base

Which of these is the base of the figure shown?

             

Choices:

A. BC

B. AB

C. AC

D. ABC

Correct Answer: B

Solution:

Step 1: The base of the triangle shown is the line segment AB.

                    

Related Terms for Base

• Plane

• Solid 

                    

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