Circles 8.1.

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Presentation transcript:

Circles 8.1

The set of infinite points equidistant from Circle - The set of infinite points equidistant from a center point. C A - Center X - Radius - Segment or distance from center to circle. O Y - Diameter M - Chord that passes through the center.

Find the diameter

Find the radius

Circumference of a circle is the outside perimeter

Circumference formulas

What is Pi ( ) ?

Circumference of a Circle Find the circumference of a circle with a diameter of 7 inches.

Find the circumference given the radius is 5 inches.

Semi Circle One half of the circle To find the circumference of a semicircle divide by 2 Add the diameter

Find the circumference of the semi circle

Homework Page 321 (3-11, 15-16) all

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