Number of Sides in a Polygon

Test your knowledge of polygons! A polygon a 2 dimensional shape, typically called a plane figure, with at least three straight sides and angles. Polygons are are made of straight lines, and all the lines connect with no gaps and no overlap.

Here are the basic polygons from 3 sides to 10 sides:

3  trigon (triangle)
4  tetragon (quadrilateral)
5  pentagon
6  hexagon
7  heptagon (septagon)
8  octagon
9  nonagon (enneagon)
10 decagon

If you’re looking for more detail, check-out this list of polygons.

Sides of Polygons

Practice your polygon skills with a short quiz.

 

 

 

Pop Quiz: Sides of a Polygon

Congratulations - you have completed Pop Quiz: Sides of a Polygon. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
How many sides does a septagon have?
A
7
B
9
C
6
D
8
Question 1 Explanation: 
A septagon has 7 sides so 7 is the correct answer.
Question 2
Which of the following has more sides than a heptagon?
A
tetragon
Hint:
A tetragon has 4 sides.
B
hexagon
Hint:
A hexagon has 6 sides.
C
pentagon
Hint:
A pentagon has 5 sides
D
nonagon
Hint:
A nonagon has 9 sides.
Question 2 Explanation: 
A heptagon has 7 sides. A nonagon has 9 sides so a nonagon is the correct answer.
Question 3
Which of the following polygons has an even number of sides?
A
septagon
Hint:
A septagon has 7 sides
B
nonagon
Hint:
A nonagon has 9 sides
C
octagon
Hint:
An octagon has 8 sides
D
pentagon
Hint:
A pentagon has 5 sides
Question 3 Explanation: 
An octagon has 8 sides. The number 8 is an even number so octagon is the correct answer.
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