Posted by dxli on
URL: https://forum.librecad.org/Polyline-Angle-another-strange-behaviour-tp5713282p5713285.html

Bonjour,

This image actually proves the arc angle is 90 degrees, by the

http://www.mathwarehouse.com/geometry/circle/angle-tangent-and-chord.php

the chord tangent angle is half of the arc angle, therefore, the arc angle is 90 degrees

Christian wrote

Well in this case it actually will accept up to 359.999 and what you get is a nearly complete circle, but if you ask for 90° you actually get 45° as you can see below where the red arc was produced with Polyline Angle 90.



Still strange, at least for an old fashion Frenchman

Christian