Import a 123D Design file of a teacup and turn it into a soup bowl with Select, Plane Cut and Duplicate. Also use the Object Browser box, Orthographic setting, Analysis tools and the Meshmix bucket.
Drafting, Modeling and 3D Printing with Lydia Sloan Cline
Hand drafting for Interior Design, SketchUp, Autodesk 123D and MakerBot