Hi guys, could you help me to draw a small quadrilateral with known edges?

So, for example, I have a quadrilateral with edges sequentially 200, 300, 250, and 220, and I need to build it in Rhino…

Super. Thank you for the idea.

For just 4 edges the circle intersection method is probably easiest.

For more complex systems you could also use constraints in the Rhino 8 WIP.

A quadrilateral with defined edge lengths still has one degree of freedom - it is a 4 bar linkage.

how did you get the diagonal?

You can pick a length arbitrarily (within a range) for the diagonal.

yes, but to get to the lenght of the diagonal i would have to make quite some geometric construction which looks from my side like that, but i am just messing around and scratching my head… not sure if thats valid since i am still in the process and seems maybe unnecessary complicated.

You start by drawing the diagonal.

Then put 2 circles at each end point (with radii equal to the length of the 2 connected edges).

Then draw the quad by making lines from the ends to the circle intersections.