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base (of a solid figure)

the face that is perpendicular to the height of a solid and is used to classify 3-D figures

cone

a 3-D figure with a circular base and one vertex/apex

cylinder

3-D object with two parallel, congruent, circular bases

net

a two-dimensional representation of a 3-dimensional figure

prism

a solid figure with two parallel congruent bases and all other faces are parallelograms

pyramid

the type of solid figure with one base and triangular lateral faces