Examples of Concave Polygon

The concave polygon has single interior angle which is more than 180 degree. The concave method is drawing few of the straight line only. The concave polygon is used in many interior angles. The three sided polygon denoted the triangle, triangle cannot be a concave polygon. In this article we shall discuss the examples and properties of concave polygon.

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Properties of concave polygons:

The concave polygons do not calculate the exterior angle. The opposite meaning of the concave is called the convex. The polygon is normally declared as concave polygon, but not the convex polygon. The interior angle must be reflex angle of the concave polygon.

The diagonal of the concave polygon is the line through the outside of the polygon. The star polygon is the example of non simple polygon. It must  contain the concave polygon with minimum of four sides. The area of the concave polygon and irregular polygons are same.

Example of the concave polygon

The first example of the concave polygon is declaring the following figure. The concave polygon connected the line of the interior angle side. The important part is declaring interior. There are only  two points selected inside the diagram. Do not select the one point which is inside of the angle and another point is outside of the diagram.

diagram repsent the example of the concave polygon

The inside of the polygon does not enter the line P and Q. The line A and B is entering the inside of the polygon. So that it is said to be concave polygon. The minimum one line segment will not present inside the diagram, this part of the diagram is called the concave.


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The above example is commonly called the concave polygon. The next example of the concave polygon is declaring the following diagram. In figure the blue line segment is declared as two points enter into the inside of the diagram. That line through the outside of the diagram.