You look up the formula for the regular shape in a table of formulae, then apply such a formula. For example, if the regular shape is a rectangular block, you multiply length x width x height, if it is a cone you calculate (1/3)Bh (1/3 times the base area times the height), etc.
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The answer is zero. A 2D shape has no volume.
The formula of volume
The surface-area-to-volume ratio may be calculated as follows: -- Find the surface area of the shape. -- Find the volume of the shape. -- Divide the surface area by the volume. The quotient is the surface-area-to-volume ratio.
if it is a regular shape, a box, prism, pyramid, cone, sphere, use a math formula. irregular shapes, use water displacement.
To find the area, first divide the shape into regular, simple shapes. Then use formulas to find the area of the smaller, regular shapes. Lastly, add up all the smaller areas to find the area of the original shape.