Centre arc with given radius and arc length instead of angle?

[jakubkfree]

I need to draw an arc with given centre point, radius and an arc length . I would use centre point arc but it only gives me degrees option and I need to have a very specific arc length. 

Is there an easy way to do it? 

[g-andresen · Accepted solution]

Hi,

works with parameter

günther

[jakubkfree]

Thank you