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Unformatted text preview: Numerical Relationships A radius is exactly onehalf of a diameter. Therefore a diameter is twice a radius. 5.5 cm If the radius is 5.5 cm, then the diameter is ___________ cm. 11 Circumference Remember, circumference is the distance around the circle. If you divide a circles circumference by its diameter, you always get the same irrational number pi (symbol: ) This is true of every circle. We estimate pi to be 3.14 or the fraction 22/7. Circumference Formulas C = d C = 2 r Example 41 m C = d C = (3.14)(41) C = 128.74 m We substitute 3.14 in for pi. Homework Time...
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This note was uploaded on 11/17/2011 for the course MATH 110 taught by Professor Staff during the Fall '08 term at BYU.
 Fall '08
 Staff

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