geometry - how to connect 4 random points with 4 no intersecting line segments?

Question

The points are in a plane，marked with two numbers indicating coordinates.give out a connect sequence.

Answer 1

以凸包为例。如果它是一个四边形，你就完成了。如果它是一个三角形，您可以将它的任何边分开以包括内部点。