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Area and Circumference of Circles
1. Radius- any line segment that connects the center to a point on the circle VOCABULARY Radius
2. Diameter- any line segment that passes through the center of the circle and connects two points on the circle. The diameter is twice the length of the radius.
3. Circumference is the word used to describe the distance around the outside of a circle.
A=π r 2 Formulas C= 2πr Or C= πd
What is pi? Pi is the ratio of the circumference of the circle to its diameter. π
Pi is an infinite decimal. Lets take a look….. The first 500 digits of pi.
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C=π d C=2πr r=½d d=rx2 A=πr² The diameter is the longest chord. The ratio of the circumference is always …. π is a Greek letter. π can also.
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It looks like this,… Not like this,…
Holt CA Course Circles and Circumference Warm Up Warm Up Lesson Presentation Lesson Presentation California Standards California StandardsPreview.
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