Explain a Circle graph in your own words

if I'm being honest, a circle graph is very difficult for me to understand. I have a feeling that you're talkin about Venn diagram, but if you're talkin about those it's where you put two things that aren't alike on two opposite sides of the circle and then in the middle you put the thing that is alike

I think it might be any positive number

Step-by-step explanation:

Because when i did the math, it was pretty complicated. Hope this somewhat helps. I tried