The remote interior angles of triangle BCD are BAE and CAB.
Triangle BCD with remote interior angles BAE and CAB labeled
Remote interior angles are angles inside a triangle that are not adjacent to the exterior angle.
In this case, angle BAE is not adjacent to angle BCD, and angle CAB is not adjacent to angle BCD.
Therefore, BAE and CAB are the remote interior angles of angle BCD.
Another way to think about it is that the remote interior angles of an exterior angle are the two angles in the triangle that are on the same side of the exterior angle.
In this case, both BAE and CAB are on the same side of BCD, so they are the remote interior angles of BCD.