Can you think of any three dimensional object that comprises of just…

Can you think of any three dimensional object that comprises of just two surfaces? Hint: A piece of paper practically has 6 surfaces as the edges are also counted. Thus if you were thinking of that, it will be a wrong answer.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #56568