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Pizza Pi

Should you ever order a personal-sized pizza from Pizza Hut?

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Pizza Pi

Should you ever order a personal-sized pizza from Pizza Hut?

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Pizza Pi - Student Handout.pdf
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Pizza Pi - Teacher Guide.pdf
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Should you ever order a personal-sized pizza from Pizza Hut? Pizza Hut pizzas come in large, medium, and personal. While the smallest size is the least expensive, it costs the most per square inch and is over half crust!

In this lesson, students calculate circle areas to compare the unit costs of different sized pizzas, find the percent of pizza that is tasty inside vs. crust, and debate whether it’s ever a good idea to order a personal-sized pizza from Pizza Hut.

REAL WORLD TAKEAWAYS

  • If crust thickness doesn’t change (and it usually doesn’t), then as a pizza shrinks ,more and more of the total area is taken up by crust.
  • Determining the best deal isn’t just about how much you get, it’s also about how much of it you want.
  • Personal pan pizzas are mostly crust.

MATH OBJECTIVES

  • Calculate the area of a circle
  • Use geometric models to solve real-world problems
  • Use unit rates or proportional reasoning to determine the best deal
Appropriate most times as students are developing conceptual understanding.
Grade 7
Measuring Circles
Grade 7
Measuring Circles
Content Standards 7.G.4 Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.
Mathematical Practices MP.1 Make sense of problems and persevere in solving them. MP.2 Reason abstractly and quantitatively. MP.7 Look for and make use of structure. MP.3 Construct viable arguments and critique the reasoning of others. MP.8 Look for and express regularity in repeated reasoning.

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Should people with small feet pay less for shoes?

Grade 7
Ratios & Proportions
Great anytime, including at the beginning of a unit before students have any formal introduction to the topic.

Common Cents

Should the U.S. get rid of the penny?

Grade 7
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Appropriate most times as students are developing conceptual understanding.

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Equations & Expressions
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How do vehicles turn so smoothly?

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Grading Scales of Justice

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Appropriate most times as students are developing conceptual understanding.