Planar ternary ring

Imagine a pizza, but instead of just having two toppings like pepperoni and cheese, it has three toppings like pepperoni, cheese, and mushrooms. Now, imagine that pizza cut into a circle and folded into a triangle shape so that the toppings are all mixed together. This is similar to what a planar ternary ring is like - it's a shape that has three different parts that are all connected in a circle, like the edges of a triangle folded into a circle. Just like on the pizza, the different parts of the planar ternary ring are all mixed together in one shape. It's a bit like a puzzle where three different pieces fit together perfectly to make one complete shape!