The volume of a three-dimensional object is the amount of space inside the object. All three-dimensional objects have basically the same formula for finding their volume:

Volume = Bh
where B is the area of the base and h is its height.

The shape of the base depends on the object. Some 3D shapes have circular bases while others could have bases that are squares, triangles, or other polygons.  If you visualize the shape of the base filling the figure, then this formula should make sense for our 5 geometric solids.   Volumes of these objects will always be given in cubic units - inches3, cm3, etc. because of their three dimensions. 


The remainder of this book will discuss how to find the volumes of prisms, cylinders, pyramids, cones and spheres.



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