# Relative distance for circle, arc

**URL:** <https://discourse.shapr3d.com/t/relative-distance-for-circle-arc/23954>\
**Category:** Feature requests\
**Created:** [February 5, 2023, 12:15pm UTC](https://discourse.shapr3d.com/t/relative-distance-for-circle-arc/23954 "2023-02-05T12:15:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Cdmd](https://avatars.discourse-cdn.com/v4/letter/c/a4c791/32.png) [@Cdmd](https://discourse.shapr3d.com/u/Cdmd)\
**Post date:** [February 5, 2023, 12:15pm UTC](https://discourse.shapr3d.com/t/relative-distance-for-circle-arc/23954/1 "2023-02-05T12:15:56Z")

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The ability to set a relative distance between two circles. For example two concentric circles that are always 1mm apart when the diameter is changed.

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**Author:** ![Peter\_Gy](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/peter_gy/32/9251_2.png) [@Peter\_Gy](https://discourse.shapr3d.com/u/Peter_Gy)\
**Post date:** [February 5, 2023, 2:44pm UTC](https://discourse.shapr3d.com/t/relative-distance-for-circle-arc/23954/2 "2023-02-05T14:44:33Z")

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If I understand correctly, this could already be done by simply drawing a (construction) line between the two circles and fixing its size:

You might need to be a bit trickier with constraining the construction lines than I was though if you plan to move the center of the circles as well.