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Review: Perimeter & Circumference

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Presentation on theme: "Review: Perimeter & Circumference"— Presentation transcript:

1 Review: Perimeter & Circumference
Math 8

2 Brainstorm Paul wants to make a sandbox out of logs. How can he figure out how many logs he needs?

3 Perimeter "peri" - around, "meter" - measure
The distance around a figure.  To find the perimeter = ADD UP ALL THE LENGTHS OF ALL THE SIDES. 

4 Estimate then calculate the perimeter of the garden

5 Calculate the perimeter

6 Calculate the perimeter

7 Calculate the perimeter

8 Circumference C = πd C = 2πr π= 3.14
Is the distance (perimeter) around a circle.  Formula: C = πd C = 2πr π= 3.14

9 The diameter of a Ferris Wheel is 55m. What is the circumference?
C = πd          = 3.14 x 55m          = 172.7mm

10 The radius of a pizza is 3. 5inches
The radius of a pizza is 3.5inches. What is the circumference of the pizza? C = 2πr          = 2 x 3.14 x 3.5          = inches 

11 Practice Complete: Perimeter – Mathpower 8
Circumference of a Circle – Mathpower 8 Perimeter & Circumference


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