7.G.A.3: Cross sections of solids

Also written as 7.G.3

Describe the two-dimensional figures that result from slicing three-dimensional figures, as in plane sections of right rectangular prisms and right rectangular pyramids.

In plain words: Students describe the flat shapes made by slicing a 3-D figure, like the cross sections of right rectangular prisms and right rectangular pyramids.

Quick picks

Common mistake
Assuming every slice of a box is a rectangle: a slanted cut across one corner makes a triangle.
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