ELI5: Explain Like I'm 5

Incidence (geometry)

Okay kiddo, let me try to explain incidence in geometry in a way that you can understand.

Imagine you have a piece of paper and you draw a shape on it, like a square or a rectangle. Now, let's say you have another shape, like a triangle, that you want to put near the square or rectangle. When you place the triangle next to the square or rectangle, you may notice something - some of the lines on the shapes line up with each other. For example, the side of the triangle might touch one of the sides of the square.

This is what we call incidence in geometry. It's a fancy way of saying that two shapes or objects are touching or lining up with each other in some way. We use this concept a lot in geometry when we're trying to figure out how shapes fit together or how lines intersect each other.

So basically, incidence is when two things meet or touch each other in geometry. It's like when two puzzle pieces fit together perfectly, except we're talking about shapes and lines instead of puzzles. Does that make sense, kiddo?