The animation is very good, making the article easy to understand

We studied it in our peparation for college entrance exams in India. Though the detail the article goes in is exhaustive. But I thought that this maybe common or almost common knowledge. We used to call it sandwich theorem

The sandwich theorem would normally refer to this one: https://en.wikipedia.org/wiki/Squeeze_theorem

I immediately thought of the ham sandwich theorem

https://en.wikipedia.org/wiki/Ham_sandwich_theorem