ELI5: Explain Like I'm 5

Dividing a circle into areas

Imagine you have a pizza, and you want to share it with your friends. But you want to make sure that every friend gets an equal portion of pizza, so you decide to divide the pizza into equally sized slices.

To do this, you take a knife and cut the pizza into pieces - you might start by cutting it in half to make two equal halves, then cut each of those halves in half again to make four equal quarters, and so on.

When you're done cutting, you'll have a number of slices that all look the same - each one is a part of the circle (pizza), but they're all equal in size.

This is the same way we can divide a circle into areas - we start by picking a point in the center of the circle (like where the pizza crust would be), and then we draw lines outward from that point to the edges of the circle. We can make as many lines as we want, but for simplicity, let's say we make four lines, so we end up with four equal segments (like four pizza slices).

These segments divide the circle into equal parts, so if we were trying to divide something evenly among four people, we could use this method to make sure everyone gets an equal share - just like how we made sure everyone got an equal share of the pizza!
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