# Calculating the circumference from cross sectional cut

**URL:** <https://discourse.vtk.org/t/calculating-the-circumference-from-cross-sectional-cut/7793>\
**Category:** Support\
**Created:** [February 8, 2022, 7:09am UTC](https://discourse.vtk.org/t/calculating-the-circumference-from-cross-sectional-cut/7793 "2022-02-08T07:09:00Z")\
**Posts on this page:** 1\
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**Author:** ![Paulo\_Carvalho](https://discourse.vtk.org/user_avatar/discourse.vtk.org/paulo_carvalho/32/370_2.png) [@Paulo\_Carvalho](https://discourse.vtk.org/u/Paulo_Carvalho)\
**Post date:** [February 8, 2022, 2:36pm UTC](https://discourse.vtk.org/t/calculating-the-circumference-from-cross-sectional-cut/7793/2 "2022-02-08T14:36:25Z")

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Hello,

Please, take a look at this: [How to extract the ids of the boundary points of a surface?](https://discourse.vtk.org/t/how-to-extract-the-ids-of-the-boundary-points-of-a-surface/2530)

It refers to an example that is no longer avaible, though a snapshot of it is available in The Wayback Machine: [https://web.archive.org/web/20200407105456/https://lorensen.github.io/VTKExamples/site/Cxx/Meshes/BoundaryEdges/](https://web.archive.org/web/20200407105456/https://lorensen.github.io/VTKExamples/site/Cxx/Meshes/BoundaryEdges/) .

regards,

Paulo

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