I am doing sacred geometry drawings. A 360-degree circle is divisible by 1, 2, 3, 4, 5, 6, 8, and 9, but not by 7. A 378-degree circle can have seven 54 degree angles. Can LibreCAD make a 378-degree circle? If yes, how?
By the way, the Sine of 54 is 0.8090, 1/2 of a Fibonacci number.
From a drafting perspective, 378° circle does not make sense.
If you are interested in having 7 slices of 54° then you can proceed as follows:
1/ create a 3 point arc choosing the center and radius
2/ click on rotate, choose the arc then the center. Start point is one tip of arc and the end of point is the other one.
3/ In the rotation dialog window: choose multiple and enter 7 then for the angle enter 54°.
As dellus noted LC does not support custom angular units. However, 360 / 378 will give you the degree measure of one segment of a circle divided into 378 segments (0.952380952 deg). Multiply that by 378 divided by the number of sections to get the degrees. e.g. 0.952380952 * (378 / 7 sections) = 0.952380952 * 54 = 51.428571408 deg for each of the 7 sections of a 378 segment circle.