When visualizing how pieces form a whole shape, what should you check to confirm an answer is correct?

To confirm a 'visualizing the whole from parts' answer, verify that every given piece is present and used, that the pieces fit together with no gaps and no overlaps, that each piece keeps its original size and shape (not resized or distorted), and that any connection points or edges line up correctly. Reject answers that drop a piece, add one, change a piece's proportions, or leave gaps. This systematic check — all pieces, correct fit, unchanged shapes — is more reliable than a quick visual impression and helps you eliminate the cleverly wrong distractors that are common on this subtest.