@maxevron said:
@dave r said:
As you can see, I have two other quarters of a disc to create (radius : 5 cm). This will be a good exercise. 😄
Well, I managed to create my quarter discs a few days ago. In fact, I made a huge trigonometry mistake. I created a circle made of 36 segments in order to have a quarter disc made of 9. I don't know why but I imagined the angle between each segment was 9° instead of 10°. So rotating my circle 4.5° (9/2) created a segment not perpendicular to the polygon I wanted to extrude. Rotated 5° fixed my problem.
Many thanks all for your precious help.