This is a generalization of BP820.
Can be arranged with multiple copies of itself to form some convex shape vs. not so.
Can be arranged with finitely many copies of itself to form some convex shape vs. not so.
Can be combined with finitely many copies of itself to form some convex shape vs. not so.
Shape can be combined with finitely many copies of itself to form some convex shape vs. not so.
Leo Crabbe