Thank you Jairo for your immediate answer. Although it is not yet what I have in mind, I see now what to do. Thanks! Willi

On 12 Apr 2021, at 23:22, Jairo A. del Rio wrote:

Is this what you need? If so, change unitsquare by fullsquare.

Jairo

El lun, 12 de abr. de 2021 a la(s) 16:06, Willi Egger (context@boede.nl) escribió: Hi

can somebody tell me why I do not get a trapezoid with bottom angles of 120 degrees?

Please try the attached minimal example.

Thank you!

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On 4/12/2021 11:47 PM, Willi Egger wrote:

Hi,

Ok, changing the unitsquare into fullsquare is giving a better result, however it is still not the right drawing. I realise, that in this case probably the use of a vector in this way is not appropriate. — I have changed the drawing into something with rotating the top-line of the rectangle around the corner. If I am correct, then this is the right drawing.

Thank you again for your answer, it made me see the culprit correctly! I hav eno clu ewhat the intended outcome is but here's some code that shows how triangles relate to squares

\startMPpage path p ; p := fullsquare scaled 4cm; path q ; q := fulltriangle rotated -90 sized 4cm; draw p withcolor red ; draw q withcolor green ; draw center p withpen pencircle scaled 3mm withcolor red ; draw center q withpen pencircle scaled 2mm withcolor green ; draw origin withpen pencircle scaled 1mm withcolor white ; draw q shifted (center p - center q) withcolor blue ; \stopMPpage ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------