# What do you call these geometric features? (jut, protrusion, ledge,...)

What do you call these geometric features?

If I have it figured out correctly:

• A and B have a protrusion or jut
• B has a nose or a lug
• C has a ledge

Is that correct? Are there any terms I'm missing? Which terms are preferable? Are there any terms just for what A has?

• As geometric shapes I don't believe the orientation will matter: if A has a protrusion, so does C (and B, for that matter). Have you looked up the definitions of all those words? If so, why and how is it unclear? Commented Jun 9, 2022 at 13:24
• The orientation can matter if we assume real world objects with gravity pointing down. In that case A can be said to have an "overhang". Commented Jun 9, 2022 at 13:31
• I don't think any of those terms are as specific as you are making them sound. For example, a lug is just a kind of projection, not something distinct from "a projection", and is defined more by use than by shape. Commented Jun 10, 2022 at 10:49