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
Which of the following two-dimensional shapes are made using only curved lines? And which use only straight lines? oval, rectangle, square, pentagon, circle and rhombus.


assistant
The oval and circle are made using only curved lines.
The square, pentagon, rectangle and rhombus are made using only straight lines.