3D Shapes and Volume. 3D shapes have volume: the amount of cubic space inside of them. To find volume, you basically need the three dimensions: length, width, and height. For prisms, the formulas are derived by taking the area of the shape at the end, and multiplying that times the figure’s height. All regular polygons have at least one axial symmetry. A regular polygon with as many axes of symmetry as it possesses sides. The axes of […]