How Circle Geometry is Calculated

• Arc Length: r × θ (θ in radians)
• Chord Length: 2r × sin(θ/2) (θ in radians)
• Sector Area: 0.5 × r² × θ (θ in radians)
• Segment Area: 0.5 × r² × (θ - sinθ) (θ in radians)