Base of a Polygon
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Definition of Base of a Polygon
Base is the bottom of a plane or a solid.
In case of trapezoids and prisms, both the top and the bottom are called bases, as they are parallel to each other.
More About Base of a Polygon
 The base of a twodimensional figure is a line.
 The base of a threedimensional figure is a plane.
Video Examples: Base of a Polygond Math
Example of Base of a Polygon

Twodimensional: Circle is the base of a cone.
Threedimensional: Square is the base of a cube.
Solved Example on Base of a Polygon
Ques: Which of these is the base of the figure shown?
Choices:
A. BCB. AB
C. AC
D. ABC
Correct Answer: B
Solution:

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