Definition Of Decahedron

A polygon with 12 sides and 12 angles is called a Dodecagon.

More About Decahedron

Each angle in a regular dodecagon is equal to 150°.
A dodecagon with all its 12 sides and 12 angles equal is called a regular dodecagon.

Example of Decahedron

The figure shown above has 12 sides and 12 angles, so it is dodecagon.

Video Examples: iCoachMath.com
 

Solved Example on Decahedron

Ques: Count the number of sides of the polygon.

Choices:

A. 12
B. 10
C. 9
D. 11
Correct Answer: A

Solution:

Step 1: This polygon has 12 sides and is called as dodecagon.

Related Worksheet

• Writing-and-Interpreting-Numerical-Expressions-Gr-5
• Finding-Missing-Number-using-Multiplication-or-Division-Gr-3
• Multiples-of-Whole-Numbers-through-100-Gr-4
• Describing-Change-in-One-Variable-Affecting-the-Other-Gr-6
• Using-Operations-to-Solve-Problems-Involving-Volume-and-Mass-Gr-3