main/src/georegression/struct/shapes/Polygon2D_F64.java
public double getSideLength( int index ) {
		Point2D_F64 a = vertexes.get( index );
		Point2D_F64 b = vertexes.get( (index+1)%vertexes.size );

		return (double)a.distance(b);
	}
public double getSideLength( int index ) {
		Point2D_F64 a = vertexes.get( index );
		Point2D_F64 b = vertexes.get( (index+1)%vertexes.size );

		return (double)a.distance(b);
	}
Resturns the length of the specified side that is composed of point index and index+1
@return Euclidean length of the side