@Olgatron Sadly, I’m not good at math… I don’t understand what you’re saying…
@moniaqua No, I need to determine the new back sleeve corner at biceps level as in the picture with the red line. The instruction is 27cm from lowered sleeve cap diagonally, and 24 cm from the center line… I determine the 27cm using the arc at a distance tool, but the problem is, I need to measure 24cm from the 27cm-radius arc…