How to find the volume of a cube formula

When solving many mathematical and physical problems it is required to find the volume of a cube. Since the cube is perhaps the simplest stereometric figure, then the formula for calculating its volume very simple. The volume of a cube equals the cube (third-degree) the lengths of its edges. However, it is not always the edge length is preset. In such cases it is necessary to use other formulas for finding the volume of a cube.

You will need

• calculator.

Instruction

1. To find the volume of a cube if you know the length of its edges, use the following formula:
   V = A3, where V is the volume of a cube and the length of his ribs.
   Calculated according to this formula the volume of a cube will have the proper cubic unit of measurement. For example, if the edge length is specified in millimeters (mm), the volume of a cube is measured in cubic millimeters (mm3).
2. To calculate the volume of a cube according to the above formula, take a scientific calculator. Type on the keyboard of the calculator the numerical value of the length of the edges of the cube. Click on the calculator button exponentiation. Depending on the type of calculator, this button may have a different view. But usually it's a couple of characters such as "xy" or "ab", and the second is slightly smaller and located a little higher. After you find and click the exponentiation, press the number "3" and then "=". The numerical value of the volume of a cube will appear on the display of the calculator.
3. To calculate the volume of a cube in ordinary ("accounting") calculator, use a simplified entry of the formula:
   V = a * a * a, where V is the volume of a cube and the length of his ribs.
   Enter the numeric value of the length of the ribs. Then press the multiply "x". Again, type the length of the ribs. Again, hit "x". And finally, re-type the length of the ribs. Then click "=".
4. To calculate the volume of a cube on the computer, use Windows calculator. Run the Calculator (start - > Run -> type calc). Switch to the mode of carrying out engineering calculations ("View" -> "Engineering"). Type on the virtual keyboard of the calculator or on the computer keyboard is the edge length of the cube. Then just press the virtual button "x^3". All the result is ready. Click on the button "=" is not necessary.
5. If the edge length of the cube is unknown, and set any other of its characteristics, to calculate its volume (V) use the following formulas:
   V = (d / √2)3, where d is the diagonal of the cube face,
   
   V = (D / √3)3 where D is the diagonal of the cube.
   
   V = 8 * r3, where r is the radius of the sphere inscribed in a cube.
   
   V = (2R / √3)3, where R is the radius of the sphere circumscribed about the cube.