Re: How to draw a 'circle' with straight sides
Posted by SouthernFellow on Feb 12, 2019; 9:02am
URL: https://forum.librecad.org/How-to-draw-a-circle-with-straight-sides-tp5716935p5716940.html
I did work it out in the end.
I ended up drawing two isosceles triangles each way from the centre point (I cheated and measured the length of the flat part on the actual component with digital calipers). I knew the length of all three sides and so used cosine law (and yeah, you bet I had to look that up on the internet!
) to work out the vertex angle.
One I'd done that, I used divide to mark the part of the arc between the intersections of the triangles sides and the circle. Then I just selected the new 'arc' entities and just deleted them. Then I just removed the sides of the triangle, leaving the bases there.
URL: https://forum.librecad.org/How-to-draw-a-circle-with-straight-sides-tp5716935p5716940.html
I did work it out in the end.
I ended up drawing two isosceles triangles each way from the centre point (I cheated and measured the length of the flat part on the actual component with digital calipers). I knew the length of all three sides and so used cosine law (and yeah, you bet I had to look that up on the internet!
) to work out the vertex angle.
One I'd done that, I used divide to mark the part of the arc between the intersections of the triangles sides and the circle. Then I just selected the new 'arc' entities and just deleted them. Then I just removed the sides of the triangle, leaving the bases there.
| Free forum by Nabble | Edit this page |