GEOMETRY & TOPOLOGY

plane curve curvature

quantifies the degree of local curvature of the parameter curve.

κ=∣x′y′′−y′x′′∣(x′2+y′2)3/2\kappa=\frac{\lvert x'y''-y'x''\rvert}{(x'^2+y'^2)^{3/2}}

symbols, variables and units

x,y: coordinates (m); apostrophe: derivation of the same parameter; κ: curvature (m⁻¹).

applicable conditions and boundaries

curve is quadratically differentiable and the velocity vector is non-zero. The

formula source code

The following is a copyable LaTeX expression.

\kappa=\frac{\lvert x'y''-y'x''\rvert}{(x'^2+y'^2)^{3/2}}

Reference and Extended Learning

OpenStax · Calculus Volume 3 ↗

is organized according to model definition and assumptions. Please check actual conditions and original literature before engineering, research and clinical use.

curvaturecurve The

Same subject formula

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