Lesson 10-1: Circles and Circumference

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10.1 Circles and Circumference

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Lesson 10-1: Circles and Circumference Geometry CP Mrs. Mongold

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

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

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

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.