What type of feature is used to define a new Sketch on a non-planar face?

The selected answer, Datum Plane, is correct because a Datum Plane is specifically designed to create a reference plane in three-dimensional space. When you are working with a non-planar face, it can be challenging to directly create a sketch, as traditional sketches require a planar surface.

A Datum Plane allows you to establish a new plane based on specific criteria, such as points, edges, or faces from the existing geometry. This plane then becomes a suitable surface to create sketches, even when dealing with complex geometries that do not have flat surfaces. By using a Datum Plane, you can ensure that your sketch is accurately positioned in relation to the non-planar geometry, allowing for precise design and modeling.

In contrast, other options do not effectively provide a solution for creating sketches on non-planar surfaces. For example, a Face Point typically represents a location on a face but does not provide a workable plane for sketching. The choice labeled as Create Non-Planar might imply the need to deal with such geometry, but it does not define a new plane to work from. Lastly, Placement Face doesn't define a new sketching surface; instead, it indicates a face used for placement, which may not cater to the requirements of creating a sketch on a non