investigation 7.1 pricing pizza tenika earline lisa byron
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Investigation 7.1Pricing Pizza
TenikaEarline
LisaByron
There are four measurements that are useful for describing
the size of a circle:
• Diameter• Radius• Circumference• Area
Diameter
•The diameter cuts the pizza into two equal halves.
Radius
•The radius is half of the diameter–It goes from the center of the pizza to the crust.
Circumference
• The circumference is the crust of the pizza.
• Circumference means perimeter in the language of circles.
Area
• The area of a circle is the number of square units inside that circle.
• The toppings on the pizza
Problem 7.1
• The Sole D’ Italian Pizzeria sells small, medium, and large pizzas. A small pizza is 9 inches in diameter, a medium is 12 inches in diameter, and a large is 15 inches in diameter. Prices for cheese pizza are $6.00 for a small, $9.00 for a medium, and $12.00 for a large.
Problem 7.1 Continued
A. Draw a 9 –inch, a 12-inch, and a 15-inch “pizza” on centimeter grid paper. Let 1 centimeter of the grid paper represent 1 inch on the pizza. Estimate the radius, circumference, and area of the pizza. (You may want to use string to help you find the circumference.)
Collecting DataSize Diameter Radius Circumferen
ceArea
Small
Medium
Large
Collecting Data
Size Diameter Radius Circumference
Area
Small 9 inches 4.5 inches
28.3 inches
63.6inches2
Medium 12 inches 6 inches
37.7 inches
113.1inches2
Large 15 inches 7.5 inches
47.1 inches
176.7inches2
Problem 7.1 Continued
B. Which measurement – radius, diameter, circumference, or area – seems most closely related to price? Explain your answer.
Reference:
Teachertube.com- HomeAlonevideo
ACE Problems
• Bring in circular objects to use in the next problems
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