# A circle has an area of 49pi square units. What is the length of the circle's diameter?

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Expert Answers

brianevery | Certified Educator

The area of a circle is found by using the formula A=PiR^2 so a circle with an area of 49pi, 49 must be the radius squared (R^2)

The sqrt(49)=7 so the radius should be 7, the diameter is twice the length of the radius, or 2*7=14

14 units is the length of the diameter.