Inscribed broken line

A line $L$ consisting of a finite number $n$ of rectilinear segments $A_0A_1,\ldots,A_{n-1}A_n$, the ends $A_i$, $i=0,\ldots,n$, of which lie on a given planar or spatial curve, the points $A_i$ being taken in increasing order of the parameter on the curve. For example, a special case of an inscribed broken line for $n=2$ is an inscribed angle. See also Inscribed and circumscribed figures.