Starting with three squares of side 1, we can rearrange them into dodecagon. The total area of the squares or dodecagon is 3. After we eat dodecagon out of the pizza (wheel), the scraps make up the extra area of 12 crescents.
Pizza = Dodecagon + 12 crescents
Since the area of 12 crescents is visibly above zero, the area of a wheel must be above 3.
I did it with a help of: https://demonstrations.wolfram.com/FreesesDissectionOfARegularDodecagonIntoThreeCongruentSquare/