Presentation on theme: "Circles and Circumference. Vocabulary A circle is a plane figure that consists of a set of points that are equidistant from a given point called the center."— Presentation transcript:
Circumference Remember, circumference is the distance around the circle. If you divide a circle’s circumference by its diameter, you always get the same irrational number – pi (symbol: π ) This is true of every circle. We estimate pi to be 3.14 or the fraction 22/7.
Example 41 m C = π d C = (3)(41) C = 123 m We substitute 3 in for pi.
Example 6in C = 2π r C = (2)(3)(6) C = 36 in We substitute 3 in for pi.