"Papa John’s pizzas come in four sizes: S, M, L & XL. But which is the best deal? We’ll calculate the area of each circle and the cost per square inch to find out." This web site provides a slide show, lesson plan, and a student handout. Use the area of a circle to extend problem solving in real world math.
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- Given the diameters and prices of different pizzas, evaluate several methods of comparing their relative values
- Use the diameter of a pizza to calculate its area
- Calculate price per square inch as a unit rate and use it as a basis of comparison
- Decompose a pizza’s area into “crust” (annulus) and “pizza” (circle) and represent those areas as percents
- colored pencils (optional)