Oh yeah.Â I had a shoulder line with a slope.Â Needed to make aÂ dart perpendicular to shoulder line at the midpoint. Aha!Â Get slope of shoulder line, negate & invert to get perpendicular slope.Â Use midpoint as center point of circle. Solve line and circle equations simultaneously.Â Â My issues were that python doesn’t like ^ for exponents, likes ** instead.Â Use as many parentheses as you can possibly stand, didn’t get the right results withÂ r / (1+m**2)**(1/2) .Â Â This was changed to (r/((1+m**2)**(.5))) and it worked perfectly.Â And did you notice my Quadratic Bezier Curve?

## About Susan

FOSS digital patternmaking developer

## 2 Responses to

Simultaneous solving of equations â€“ who knew it would come to this?