legnthXwidthXheight
Top is close, but only for a rectangular prism :(...
It is actually (base area) X height.
For pyramids, it is 1/3(base area) X height.
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A 2D shape is flat and only has a surface area whereas a 3D shape is an object that has surface area and volume.
A pentagon is a 2D shape. Volume and Surface Area is only found in 3D shapes.
a face.
because for a 3d shape you use surface area which is the same except you calculate the area of each side and then add them together
A cone