You will need

- calculator

Instruction

1

The cube is so symmetrical figure that in order to find his side (rib) enough to know at least one of the main parameters

P - square faces

**of the cube**. These include its volume, area of facets, length of the diagonal faces and the length of the diagonal**of the cube**(so-called "big diagonal").To find**side****of a cube**if you know the area of one side, remove from the numeric value of the square faces of the square root. As a formula, this relationship can be written in the following form:S = √P where: – length of sides (faces)**of the cube**,P - square faces

**of the cube**.This formula is derived from the fact that the face**of the cube**is a square with a side equal to the edge**of the cube**and square equal to the square of the ribs.2

Finding the sides (edges)

(3√ - the function of extracting the cube root).

**of a cube**, given the volume similarly. As the volume**of a cube**is equal to the third order (cube) of the lengths of its edges, to determine the length of the edges**of the cube**remove from its scope the cube root. That is, use the formula:S = 3√V, where the volume**of the cube**.(3√ - the function of extracting the cube root).

3

To find the sides (edges)

**of the cube**diagonal of its faces, extract the square root of the square of the diagonal divided by two. As a formula this rule as follows:S = √(D2/2), where d is the length of the diagonal faces**of the cube**. The validity of this formula follows from the Pythagorean theorem because the diagonal and two adjacent edges form an equilateral right triangle, where the diagonal is the hypotenuse, and the edges of the legs.4

To find the

**side**(edge)**of the cube**on its diagonal (which is the diagonal**of the cube**and not the faces) and extract the square root of one third of the square of the length of this diagonal. That is, use the same previous formula:S = √(L^2/3).This formula is also derived based on the Pythagorean theorem because the diagonal**of the cube**, the diagonal edge and the edge**of the cube**form a rectangular (but longer shaft than crossbar) triangle.Useful advice

For finding square roots and cube roots use a scientific calculator. To extract the root of the third degree raise to the power of⅓.