The hidden math in this image is that it has triangles, circles. It has circumference in the circular seat. It has the correct calculated structure and the poles that are their to support it are angled. The poles are also cylinders and are dug into the ground to help with the structure and support. The calculated tension in the chains, too tight and the chains will snap, too little and the chains will not work. They have to determine what the best maximum speed, distance and force would make the swing enjoyable but safe. The swing also has symmetry if you look at it without colour, one side is the same as the other.
