Model the object's whole three-dimensional envelope, not decorative details such as seams or texture. Compare its width, height, and depth, then ask whether the surface stays rounded in every direction or instead has flat faces, straight edges, or taper. The simplest solid preserving those defining features is the useful approximation.
Inside Gozunta
Turn the preview into practice.
More than a preview
Gozunta lets you study this problem—and more than 10,000 others.
Create targeted learning sessions, use hints, check your answer, read the walkthrough, watch the video, print the work, and track your progress.