Decagon

Definition of Decagon

• A decagon is a polygon with ten sides.

More about Decagon

• The figure shows a decagon.

• The figure shown below is a regular decagon. It is regular, because all its sides and angles are congruent.

       

                         

Solved Example on Decagon

Find the area of the regular decagon with sides of length 14.4 cm and apothem 17.3 cm.

Choices:

A. 1255.60

B. 622.80

C. 1245.60

D. 830.40

Correct Answer: C

Solution:

Step 1: Perimeter P of the regular decagon = n × s = 10 × 14.4 = 144 cm.

Step 2: Area A of the regular decagon

                                                                     

Related Terms for Decagon

• Polygon
• Side
• Regular

Additional Links for Decagon

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