Usually, yes. This one is effectively a d6 (a cube), but two of the flat faces have been replaced by curves that connect opposite flat faces. As such you’ve got four flat faces that the die can actually stop on. If you ignore the curved parts but consider all of the flats to be separate faces, it’s a d4. If you consider two flats connected by a curve to be a single face altogether, it’s a d2.
This is correct. It’s a d4 that’s just as cleanly a d4 as a regular d4 with rounded corners. Both have parts that don’t belong to the sides, since there’s no defined outcome where the dice comes to rest on one of the rounded non-side parts.
Usually, yes. This one is effectively a d6 (a cube), but two of the flat faces have been replaced by curves that connect opposite flat faces. As such you’ve got four flat faces that the die can actually stop on. If you ignore the curved parts but consider all of the flats to be separate faces, it’s a d4. If you consider two flats connected by a curve to be a single face altogether, it’s a d2.
This is correct. It’s a d4 that’s just as cleanly a d4 as a regular d4 with rounded corners. Both have parts that don’t belong to the sides, since there’s no defined outcome where the dice comes to rest on one of the rounded non-side parts.