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

Slides:

Advertisements

Similar presentations

How to calculate the area of a circle.

Advertisements

5th Grade Miss Cameron’s Class

SPI: Calculate with circumferences and areas of circles.

Combining Like Terms. Only combine terms that are exactly the same!! Whats the same mean? –If numbers have a variable, then you can combine only ones.

Find the circumference of the following circles: (Write the formula that you will use.)

Prime Time Circle the seven prime numbers that, when added together, equal 75. 3, 11, 14, 13, 5, 17, 12, 6, 19, 23, 7, 9 Remember a prime number is a number.

Solving Quadratic Equations by Completing the Square

Problem 7.1 The Pizzeria sells small, medium, and large pizzas. A small is 9 inches in diameter, a medium is 12 inches in diameter, and a large is 15.

$100 Algebraic Expressions Circumference Area of a Circle Pan-Balance Problems Miscellaneous $200 $300 $400 $500 $100 $200 $300 $400 $500 $100 $200.

Solving Quadratic Equations by Completing the Square

Areas of Circles and Sectors

Lesson Objectives 1.You will gain a deeper understanding of the fundamental concept of area of a circle. 2.You will understand how the formula for the.

Radius The distance from the center of a circle to any point on the circle. M A point on the circle Center.

Seventh Grade Geometry Unit 5. Warm Up 1) Complementary angles add up to ______. 2) The angles in a triangle add up to _______. 3) _________________________.

Seventh Grade Geometry Unit 5. Warm Up 1) Complementary angles add up to ______. 2) The angles in a triangle add up to _______. 3) _________________________.

Area and Circumference of Circles

Circles: Area and Circumference. Definitions Circumference: Distance around the outside of a circle Area: How many squares it takes to cover a circle.

Perimeter and Area. Common Formulas for Perimeter and Area Square Rectangle s l s w A = lw P = 4sP = 2l + 2w Perimeter and Area of Rectangle.

Objectives: Students will use a ruler to measure diameters of circles and then find area and circumference of circles. M11.C.1.

Area of a Circle. The area A of a circle equals the product of π and the square of its radius r. When finding the area of a circle, you have to use the.

Math Circumference of Circles & Area of Circles. Vocabulary A circle is the set of all points in a plane that are the same distance from a given point,

Lets begin, next Instruction Read each question and answer by clicking the correct answer. Lets go.

Circumferences and Areas of Circles COURSE 3 LESSON 8-8 The diameter of a small pizza is 24 cm. Find its area. Round to the nearest tenth. A = r 2 Use.

Do Now C = π x D; D = 2R; R = ½ D. Find the 1). Radius if the Diameter is 8 miles 2). Diameter if the Radius is 12 inches 3). The circumference if the.

Transparency 2 Click the mouse button or press the Space Bar to display the answers.

6.7 Circumference & Area Notes. Circumference The distance around a circle. Do you remember the formula??? C = 2  r or C =  d * Always use the  button.

Circumference and Area of a Circle. Diameter Radius centre What is the formula relating the circumference to the diameter?

Defining Success Easy As Pie? In this lesson we will: M.7.G.4 – Discuss the formulas for the area and circumference of a circle and use them to solve.

EXAMPLE 1 Rewrite a formula with two variables Solve the formula C = 2πr for r. Then find the radius of a circle with a circumference of 44 inches. SOLUTION.

CIRCUMFERENCE: or If you unwrap a circle, how long will the line be?

10.4 Area and Circumference. Solving Area Problem Find the area of polygon shown at right. Solution: A = (3)(13)f 2 + (3)(6 + 3)f 2 = 39f f 2 =

9-5 Area of Circles Course 2 Warm Up Warm Up Problem of the Day Problem of the Day Lesson Presentation Lesson Presentation.

The area of the circle is about 227 m 2. COURSE 2 LESSON 8-4 Find the area of the circle to the nearest unit. = (8.5) 2 Substitute 8.5 for the radius.

Circumference and area of circles Pick up your calculator for today’s notes.

UNIT 9: GEOMETRY – 6 TH GRADE LESSON 5: AREA OF A CIRCLE.

Warm-Up Find the area: Circumference and Area Circles.

1. Find the. C A 172  Warm up – Round to the nearest hundredth. B 2. Find the radius. 4. Find the arc length of 3. Find the circumference.

The Circle. The language of circles Circumference: The distance round the circle Circumference: The distance round the circle Diameter: the distance from.

Circumference Lesson #33. What is Circumference? The distance around the outside of a circle is called the circumference (essentially, it is the perimeter.

Bell Work Find the circumference of the circles.

10-7 Surface Areas and Volumes of Spheres Two Theorems.

Geometry – Circles.  Circles are shapes made up of all points in a plane that are the same distance from a point called the center.  Look at this example.

Geometry :. In this lesson, you will learn how to find:

Area Circumference Sectors

Find the surface area of a sphere

Warm-Up 1.Find the circumference of a circle with a diameter of 10ft. Round your answer to the nearest tenth. 2.Find the circumference of  A if the radius.

CIRCLES CIRCUMFERENCE & AREA. CIRCUMFERENCE C = ΠdorC = 2Πr 12cm.

EXAMPLE 1 Rewrite a formula with two variables Solve the formula C = 2πr for r. Then find the radius of a circle with a circumference of 44 inches. SOLUTION.

AREA OF A CIRCLE Learning Target 4: I can solve problems using area and circumference of a circle.

By Renikki Alexander IDT 7062 Let’s Listen to the Circle Song "πr 2 sounds like area to me and when I need circumference I'll use πd."

Finding Circumference for 4 th and 5 th Grade By Andrea Klee.

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.

FW 3.2: Area of a Circle Learning Target: I will find the area of a circle by estimating and squaring a circle. HW: Complete Inv. 3.2 pkt p. 6 and CORRECT.

Do Now:. Circumference What is circumference? Circumference is the distance around a circle.

Circles. Parts of a Circle Center The diameter is the distance across the circle through the center The radius is the distance to the center point.

CIRCLES AND CIRCUMFERENCE. CONTINUATION OF PI DAY In every circle, the ratio of the circumference to the diameter is equal to …… The Greek letter.

Circles Circles are EVERYWHERE..

Section 11.3 Notes: Areas of Circles and Sectors

Circles: Circumference & Area

Check your understanding!

Circles: Circumference & Area

9-5 Area of Circles Warm Up Problem of the Day Lesson Presentation

Circumference Definition: The distance around a circle. It’s a special word for perimeter. Picture:

ANSWERS WILL BE IN SQUARE UNITS

3. Find the circumference. 4. Find the arc length of

The Distance Formula Use this formula to find the distance between the following two points.

Presentation transcript:

Pizza, Pizza! By: Tracy Balow & Kristen Moorhouse

Which is the better buy? 12 inch 9 inch thin crust pizza for $10.99 9 inch thin crust pizza for $7.99

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…

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.

Correct! Area refers to the region contained by the whole pizza. You would use area to find out how much pizza there is!

Now… can you write the formula to find the area of a circle? Think, pair, share…

Now, find the area of each pizza. Round to the nearest hundredth. A = 113.04 in2 9” pizza A = πr2 A = 3.14(4.5)2 A = 3.14(20.25) A = 63.59 in2 Remember the radius is half the diameter! Think, pair, share…

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…

Now, find the unit rate of each pizza. Round to the nearest hundredth. $10.99 113.04 in2 = 0.0972 = $0.10/in2 9” pizza $7.99 63.59 in2 = 0.1256 = $0.13/in2 Think, pair, share… Vs.

So, after doing all that work and getting all those answers… Which pizza is the better buy? And…. Why? Explain. Think, pair, share…

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?

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…