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math.geometry-arc-sector Calculator
Calculates arc length, sector area, and segment area of a circular sector from radius and central angle. Sector area = (θ/2π) × πr² — a fraction of the full circle proportional to the angle.
Inputs
R
Distance from centre to edge of a circle. Radius = diameter / 2.
Theta
Reference formula or conversion factor shown for context.
N
Reference formula or conversion factor shown for context.
Chord
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.