14 ms·
See https://en.wikipedia.org/wiki/Crofton_formula https://en.wikipedia.org/wiki/Crofton_formula Also see page 41 of Differential Geometry of Curves and Surface
by defen 9y ago
See https://en.wikipedia.org/wiki/Crofton_formula https://en.wikipedia.org/wiki/Crofton_formula
Also see page 41 of Differential Geometry of Curves and Surfaces by Manfredo Do Carmo