This seems to work in place of 0.866cm: sqrt(3)/2*cm Michael On Feb 2, 2017, at 3:54 PM, Fabrice Couvreur > wrote: Hello, I wanted to use sqrt(3)/2 but without success. Instead, I replaced this value with an approximate value 0.866 How should it be done ? Thank you Fabrice \starttext \startMPcode draw fullcircle scaled 1cm withcolor magenta ; draw fullcircle scaled 1cm shifted (1cm,0) withcolor magenta ; draw fullcircle scaled 1cm shifted (0.5cm,0.866cm) withcolor magenta ; \stopMPcode \stoptext ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ________________________________ This e-mail message (including any attachments) is for the sole use of the intended recipient(s) and may contain confidential and privileged information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message (including any attachments) is strictly prohibited. If you have received this message in error, please contact the sender by reply e-mail message and destroy all copies of the original message (including attachments).