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### Geometry5.3 Circumference of a Circle

 Circumference of a Circle: The distance around a circle is called the called the circumference. It is denoted by "C". The circumference of a circle is p times its diameter or 2ptimes its radius. p is a constant, the value of p is 22/7. \C = pd or C = 2pr Example: The radius of a circle is 3.5 cm. Find its circumference. C = 2pr Given that r = 3.5 cm, \C = 2 * 22/7 * 3.5 = 22cm \C = 22 cm Directions: Answer the following questions. Also write at least 5 examples of your own.
 Q 1: The radius of a circle is 2.1 cm, find its circumference.13.2 cm6.6 cm13.0 cm26.4 cm Q 2: The diameter of a circle is 6.3 cm, find its circumference.20.0 cm39.6 cm19.8 cm9.9 cm Q 3: The radius of a circle is 1.4 cm, find its circumference.17.6 cm8.8 cm8.0 cm4.4 cm Q 4: The radius of a circle is 2.8 cm, find its circumference.18.0 cm17.6 cm8.3 cm35.2 cm Q 5: The diameter of a circle is 5.6 cm, find its circumference.17.6 cm17.0 cm35.2 cm8.3 cm Q 6: The diameter of a circle is 35 cm, find its circumference.100 cm55 cm110 cm220 cm Q 7: The diameter of a circle is 28 cm, find its circumference.44 cm88 cm176 cm80 cm Q 8: The radius of a circle is 4.9 cm, find its circumference.30.0 cm15.4 cm30.8 cm61.2 cm Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!

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