What are diagonal lines?

Diagonal lines are slanted lines that go from one corner to another, just like when you tilt a book on your desk.

Imagine you're playing with building blocks. If you stack them straight up and down, they make vertical lines. If you lay them flat across the table, they make horizontal lines. But if you push one block so it’s leaning from the bottom left to the top right, that's a diagonal line, like when you tilt your head to look at something funny.

Think of a ruler on your desk. If it’s lying straight across the table, that’s horizontal. But if you lift one end up and push the other down, so it looks like a slide from one side of the desk to the other, that's a diagonal line, just like a slide in a playground!

You might see diagonal lines on a soccer field when players run from one corner to another, or even in a staircase if you look at it from the side.

Diagonal lines are everywhere, they’re just slanted!