Why Does a Pizza Slice Have a Curved Edge?

Pizza slices are like pieces of a circle. When you cut a pizza into slices, each slice is shaped like a triangle, but the edge that goes around the whole pizza is still curved, just like the edge of a plate! That curved edge means each slice has one straight side (where it was cut) and one curved side, which makes the shape look more interesting.

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Examples

Imagine cutting a cake, each piece has one straight side (the cut) and one curved edge from the top of the cake.
A pizza slice looks like it came out of a circular shape, not a square or rectangle.
If you draw a circle and slice it into pieces, each piece will have a curved edge where it meets the full circle.

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Categories: Math · geometry· pizza· math in everyday life· curves· shapes