In this page we practice identifying polygons and understanding their basic properties.
Example 1 – Triangle
Is a triangle a polygon?
Yes.
It is closed and has three straight sides.
Example 2 – Circle
Is a circle a polygon?
No.
A circle has a curved boundary.
Example 3 – Open Shape
Is an open shape made of four straight segments a polygon?
No.
A polygon must be closed.
Example 4 – Pentagon
How many sides does a pentagon have?
Five sides.
Example 5 – Regular Pentagon
Is a regular pentagon regular or irregular?
Regular.
All sides and all angles are equal.
Practice
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