The four equal sides were all a smooth surface, he had carved and sanded a perfect what?\nOptions:\n- lake\n- tetrahedron\n- ball\n- object\n- mirror Let's give stream of consciousness first:
User
Tetrahedron can be carved from a 4 equal side surface. Smooth surface leads to carving of a perfect tetrahedron.
Therefore, the answer is tetrahedron.
Assistant