startX = 0
startY = 0
angleOffset = 135
r = 1
angleStart = 110

startSketchOn('XY')
  |> startProfileAt([startX, startY], %)
  |> angledLine({ angle = angleStart, length = .000001 }, %)
  |> tangentialArc({ offset = angleOffset, radius = r }, %, $arc1)
  |> tangentialArc({
       offset = angleOffset,
       radius = 0.5 * r
     }, %, $arc2)
  |> tangentialArc({
       offset = -angleOffset,
       radius = 0.5 * r
     }, %, $arc3)
  |> xLine(endAbsolute = 1)