Cutting segments from a circle

[Grey Geezer]

Greetings!
(Ver. 4.1 unter Windows)
I am struggling with the following problem:

Given: A circular shape, defined by 2 circular paths (one 'outside', one 'inside'), each path constructed by 8 Bezier-Points.

Challenge: How can I 'cut out' a segment from this circle?
E.g.  From the Top of the circle I want to go down 10° (one 36th of the circle) and cut out this element ("cut an opening into the circle at a given position").

Thanks for advice!
Grey Geezer

[Grey Geezer]

... OK, problem solved.
However, not the most intuitive program I ever worked with...

Bye
Grey Geezer

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