Sector Area Calculator
Aug 20, 2019 · Then, we want to calculate the area of a part of a circle, expressed by the central angle. For angles of 2π (full circle), the area is equal to πr²: 2π → πr². So, what's the area for the sector of a circle: α → Sector Area. From the proportion we can easily find the final sector area formula: Sector Area = α * πr² / 2π = α * r² ...
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