CALCULATOR
Circle Tangent Length from Radius and External Clearance Calculator
Circle Tangent Length from Radius and External Clearance. Example: Radius: 3 m, Clearance: 2 m gives 4 m. Real bounded inputs with supplied units; numerical selected result only. Original useful product scope; historical catalog title does not grant missing modes or source parity.
Real bounded inputs with supplied units; numerical selected result only. Original useful product scope; historical catalog title does not grant missing modes or source parity. Derivation: Right triangle formed by radius and tangent gives t²=(r+q)²-r²; factored form avoids cancellation.
Accepted inputs: Radius: 0.1 to 1,000 m; Clearance: 0.1 to 1,000 m.
How the calculation works
t=√(q(2r+q)); center distance=r+q
Worked example
With radius 3 m, clearance 2 m, circle tangent length from radius and external clearance is 4 m.
Assumptions and limits
Real bounded inputs with supplied units; numerical selected result only. Original useful product scope; historical catalog title does not grant missing modes or source parity. Derivation: Right triangle formed by radius and tangent gives t²=(r+q)²-r²; factored form avoids cancellation.