1.Previous
3.Next

of a concave polygon lie partly or wholly outside the polygon. Some sidelines of a concave polygon fail to divide the plane into two half-planes one of which entirely contains the polygon. None of these three statements holds for a convex polygon.

As with any simple polygon, the sum of the internal angles of a concave polygon is (n - 2) radians, equivalently 180°(n - 2) degrees, where n is the number of sides.

1.Previous
3.Next