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Chapter 10: Circles

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**10.1 Circles and Circumference**

Name a circle by the letter at the center of the circle Diameter- segment that extends from one point on the circle to another point on the circle through the center point Radius- segment that extends from one point on the circle to the center point Chord- segment that extends from one point on the circle to another point on the circle Diameter=2 x radius (d=2r) Circumference: the distance around the circle C=2πr or C= πd

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Circle X Diameter- Radius- Chord- A chord B diameter E C X radius D

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Name the circle Name the radii Identify a chord Identify a diameter

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**Find the circumference of a circle to the nearest hundredth if its radius is 5.3 meters.**

b. Find the diameter and the radius of a circle to the nearest hundredth if the circumference of the circle is 65.4 feet.

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