Download presentation

Published byDesmond Stokoe Modified over 3 years ago

1
Pizza, Pizza! By: Tracy Balow & Kristen Moorhouse

2
**Which is the better buy? 12 inch 9 inch thin crust pizza**

for $10.99 9 inch thin crust pizza for $7.99

3
**To solve this problem, which concept will you need to use?**

a) the circumference of a circle OR b) the area of a circle Think, pair, share…

4
**Try again! Circumference refers to the distance around a circle.**

You would use circumference if you only wanted to eat the crust. Click on the pizza to continue.

5
**Correct! Area refers to the region contained by the whole pizza.**

You would use area to find out how much pizza there is!

6
**Now… can you write the formula to find the area of a circle?**

Think, pair, share…

7
**Now, find the area of each pizza. Round to the nearest hundredth.**

A = in2 9” pizza A = πr2 A = 3.14(4.5)2 A = 3.14(20.25) A = in2 Remember the radius is half the diameter! Think, pair, share…

8
**Now, how can we use that information to find the better buy?**

Recall, to find the better buy, you need to find the price per one unit (the unit rate!). Soooooo, take the price and divide it by the area of the pizza. This will give you the price per square inch of pizza! Do this for both pizzas so you can compare their unit prices. Vs. Think, pair, share…

9
**Now, find the unit rate of each pizza. Round to the nearest hundredth.**

$10.99 in2 = = $0.10/in2 9” pizza $7.99 63.59 in2 = = $0.13/in2 Think, pair, share… Vs.

10
**So, after doing all that work and getting all those answers…**

Which pizza is the better buy? And…. Why? Explain. Think, pair, share…

11
**Let’s review…. How did we solve the problem? What were the steps?**

What did the original question ask? What vocabulary did we need to know? What information did we need to know to solve the problem? How did we solve the problem? What were the steps? How can we check our answer? What standards were addressed?

12
Finally…. How would you solve this same problem if the pizzas had different thicknesses? Explain. How would you solve this same problem if the pizzas were square? Explain. Think, pair, share…

Similar presentations

OK

Perimeter and Area of Circles and Sectors I CAN -Find the circumference and area of a circle -Find the arc length of a sector -Find the area of a sector.

Perimeter and Area of Circles and Sectors I CAN -Find the circumference and area of a circle -Find the arc length of a sector -Find the area of a sector.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Free download ppt on cybercrime in india Ppt on vitamin c deficiency Ppt on art of war Ppt on indian airline industry Ppt on allotropes of carbon Ppt on bond length definition Circulatory system anatomy and physiology ppt on cells Ppt on fibonacci numbers stock Seminar ppt on lasers in general surgery Ppt on historical places in india