Splitting a Periodic Face

  1. Click Design > Intersect > Split .
  2. Click the Select Target tool guide and select the periodic face you want to split.
  3. Click the point of the face where you want it split, as shown in the example.
  4. The Select Results tool guide is now active, so you can click edges that you don't want to keep, as shown on the left of the image below. The result after the two straight edges have been removed is shown on the right.