Mastering MISSING LINES - Surprisingly Tricky Examples

[@mathewlarsen4414]

Did you miss the hidden divot in the right side view of the first problem?

[@BrianBernardEngineering]

If this is referring to the divot on the front view, at the top of the vertical hole - no, I don't think that would be visible from the right. The dip that is visible on the front view should fall exactly behind the curved visible line on the top of the right side view.