Rectangles interpreted as 4 coplanar edges with one face…
They are not rectangles but trapezoids as I referred to them in my earlier posts.
And they don’t meet the definition of triangle that I learned when I was 3. 
I was thinking complex curves, extrusion tools etc that will create quads that are in fact 2 triangles with a soft joint.
@Cotty I was being picky because a rectangle has 90 deg corners.
I know, but it was the nearest english word for that 4 edges thing in my mind without using the translator at that moment 
Don’t worry, it usually my german wife that corrects my spelling and Grammer.