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circles
Area of a circle = ∏r
2
Use the circle area formula to work out the area of the pizza in each
deal. Is MegaSlice really a better value?
It’s true—if you crammed enough narrow triangles into a circle,
eventually you’d get a perfect fit. You’d need an infinite number of
triangles, but it turns out the number of triangles cancels neatly, so
wham—you just found the formula for the area of a circle!
If your sectors
are small enough,
eventually it’s a
perfect fit.
∏
r
2
They actually need to be REALLY
small, much smaller than this, but
if we drew them that small they’d
be impossible to see!
If your calculator doesn’t have a
Pi button then you can use 22/7
to get an approximate value for Pi.
With enough (infinite)
triangles there are no
rough edges.