![]() ![]() Working with volume does involve 3 dimensions. that are shown on paper as flat – there is no depth, or 3rd dimension. When your child starts working with area and perimeter he or she will usually work with 2 dimensions – squares, rectangles, triangles, etc. Notice how we get the same answer no matter what side we use to find an area. The examples below show how there are three ways of doing this. We calculate the area of one face (or side) and multiply that by its height. We need to do two multiplications to work out the volume. The volume of a rectangular prism is = length x width x height Examples of calculating the area of a rectangle ![]() The rectangular prism above has an volume of 48 cubic units. We can count the cubes although it is quicker to take the length, width, and height and use multiplication. How many cubes are in this rectangular prism (cuboid)? Volume is measured in cubes (or cubic units). Note: To be totally smart, volume and capacity aren’t always the same – think of a box with really thick sides! Calculating Volume Sometimes you might hear questions like “what is the capacity of a box?” or “how much can the box hold?” You can assume that these questions will need a volume to be calculated. Volume measures how much space an object occupies. Example of Calculating the Volume of a Sphere.Example of Calculating the Volume of a Cone. ![]() Example of Calculating the Volume of a Cylinder.Examples of Calculating Volume of Rectangular Prisms.Examples of calculating the area of a rectangle. ![]()
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