Mathematics
Annulus area
Calculates annulus area from outer and inner diameters.
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Circle area
Calculates circle area from diameter.
Circle circumference
Calculates circle circumference from diameter.
Circle sector area
Calculates circle sector area from radius and angle in radians.
Circle segment area
Calculates circular segment area from radius and central angle in radians.
Hexagon area
Calculates regular hexagon area from side length.
Rectangle area
Calculates rectangle area from width and height.