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diameter diameter question

Algebra
Tutor: None Selected Time limit: 0 Hours

  1. What is the area of the circle in terms ofπ?
  2. What is the are of the circle using an approximation of π?
  3. What approximation of π did you use in part (b)? Why did you choose that approximation?
Dec 17th, 2014

1.  Area of a circle with radius r is given by the formula: A= pi x r^2

2.  Area of a circle using an approximation of pie is = 3.1416 x r^2

3. I used pie = 3.1416 for approximation in (2) because it provides area directly in decimal form and easy to calculate with a calculator.  Another approximation of pi is 22/7which  does not provide answer directly in a decimal number.

Dec 17th, 2014

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