Karl piled twelve 1" cubes in three layers on top of a square made with four 1" cubes. What shape is the structure that Karl made? help me with the answer
It's a rectangular prism.
http://www.kidsnewsroom.org/resources/sol/tx/G05M04/prism.jpg
http://www.kidsnewsroom.org/resources/sol/tx/G05M04/prism.jpg