Definition Of Decagon

Decagon is a polygon with 10 sides and equal number of angles.

More About Decagon

Each angle in a regular decagon is equal to 144°.
A regular decagon is one that has its 10 sides of equal length and 10 angles of equal measure.

Example of Decagon

The given polygon has 10 sides and 10 angles. So, it is a decagon.

Video Examples: Geometry - Area of a Regular Decagon
 

Solved Example on Decagon

Ques: Count the number of angles of the polygon.

Choices:

A. 10
B. 8
C. 6
D. 7
Correct Answer: A

Solution:

Step 1: This polygon has 10 angles.

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