Arc length & sector area

Calculate the arc length or sector area given a radius and central angle.

Find

Radius Angle (°)

Arc length: s = rθ (θ in radians) or s = 2πr × (θ/360°)

Sector area: A = ½r²θ (θ in radians) or A = πr² × (θ/360°)

Radius 5, angle 60°: Arc length = 2π(5)(60/360) = 5π/3 ≈ 5.24. Sector area = π(25)(60/360) = 25π/6 ≈ 13.09.