system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Classify the following shapes as either two dimensional or three dimensional: cube, circle, sphere, triangle, cone, rhombus, square, and pyramid.


assistant
A cube, sphere, cone, and pyramid are three dimensional.  A circle, triangle, rhombus, and square are two dimensional.