Ceva's theorem

Ok kiddo, so imagine you have a triangle with three sides, and you draw three lines that connect the middle of each side with the opposite corner. These lines are called the "medians" of the triangle.

Now, CeVa's theorem says that if you take any three points on these medians (one on each), and you draw lines from each point to the corners of the triangle not connected by the median, then the three lines will all meet at the same point.

Basically, it's saying that if you connect three points on the medians of a triangle in a certain way, those lines will always intersect at the same spot, no matter which points you choose. It's like a puzzle, and once you figure out the right pieces, they always fit together perfectly.