Sketching Construction Lines

  1. Click Isometric (Standard Views toolbar).
  2. Click Plane (Sketch toolbar) and in the PropertyManager, do the following:
    1. Select Front Plane for First Reference.
    2. Select Coincident , and then click .
  3. Click Centerline (Sketch toolbar), and use inferencing to sketch a vertical construction line coincident to the mid point of the tangent arc.
  4. Clear the Centerline tool.
  5. Sketch a construction line perpendicular to the existing construction line that spans the circle.