How do you make 4 triangles into a concave hexagon?

To form a concave hexagon from four triangles, you can arrange the triangles such that two of them share a common side, while the other two are positioned to create indentations. For example, place two triangles adjacent to each other to form a larger triangle, then attach the third triangle to one side, and the fourth triangle in a way that creates an inward point, forming a concave shape. Make sure that the angles of the triangles allow for the necessary concave indentations, resulting in a six-sided figure with at least one inward angle.