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# 10.3 - Circumference of a Cirlce

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Middle School Math Book 1 - Chapter 10.3 Circumference of a Circle **Formated from a SmartNotebook file

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### Transcript of "10.3 - Circumference of a Cirlce"

1. 1. 10.3 Circumference of a Circle Joseph Williams Melvin E. Sine Elementary [email_address] Objective: Find the circumference of a circle.
2. 2. Vocabulary Circle - pg. 485 - the set of all points in a plane that are the same distance from a point called the center. Center - pg. 485 - The point inside a circle that is the same distance from all the points on a circle. Radius - pg. 485 - The distance from the center of a circle to any point on the circle.
3. 3. Vocabulary Diameter - pg. 485 - the distance across the circle through its center. Circumference - pg. 485 - the distance around a circle (the perimeter of a circle is called circumference) pi - - pg. 485 - the ration of the circumference of a circle to its diameter. ( 3.14 )
4. 4. Diagram of a Circle Center Diameter Radius Circumference
5. 5. Label Each Circle Center Radius Diameter Circumference
6. 6. Finding Circumference C = 2 r C = d 5 C = 2 3.14 5 C = 31.4 12 C = 3.14 12 C = 37.68