Problem 12 of 34geo-012
A circle has a radius of centimeters. A sector of the circle has a central angle of . What is the area of the sector, in square centimeters?
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Solution walkthrough1:33
- A sector is a slice of a circle. This slice has radius cm and a central angle of .
- A full turn is , so the slice is of the circle.
- Area of the whole circle: square centimeters.
- The sector is of that: square centimeters.
- is the whole circle. is the arc length, one sixth of . forgets to square the .