Tangent Length to Circle
Find tangent length from an external point to a circle.
Your numbers
Tangent length
Use consistent units. The result follows the assumptions you enter.
Scenario comparison
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Formula
t=√(d²−r²)
Find tangent length from an external point to a circle.
Worked example
- Distance to centre (m)
- 5
- Radius (m)
- 3
- Tangent length
- 4 m
Scope and limitations
Use consistent units. The result follows the assumptions you enter.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: e8e80a1e2c25 · Example checked: