Arc Length & Sector Area
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What you'll learn
Finding arc length and sector area as a fraction of the full circle, working backwards to find a missing radius or angle, and sector perimeters, all in degrees with pi = 3.14.
- A sector is a fraction of a full circle
- Arc length: a fraction of the circumference
- Sector area: a fraction of the circle's area
- Working backwards to find the radius or the angle
- The perimeter of a sector is the arc plus two radii