Advice 1: How to put the sign of the diameter

To denote the diameter on the drawings and in the technical documentation uses a special sign. However, on the computer keyboard, this symbol is missing on both primary and additional keys. However, it can be placed in the text, if the format in which the text will be stored and subsequently displayed, it allows. Txt, alas, be excluded from, and instructions for Word documents and html given below.
How to put the sign of the diameter
Instruction
1
Use a special component of Windows operating system which is called "symbol table". Link to his start-up can be found in the main menu on the button "start" - opening it, go to "All programs", then to "Standard" and then in the section "Service" where you will find a link with this name. Another way is to press the key combination win + r, in the dialog that opens, run programs, enter charmap and press Enter.
2
Find the table icon diameter. Note that similar shape characters there may be a few - not less than two (depending on installed typefaces). On the first page, you can find two options - select the appropriate one and double click it, and then copy it to the clipboard by clicking the Copy button.
3
Switch to the document window where you want to enter a mark diameter, and insert it from the clipboard by pressing ctrl + v or ctrl + Insert.
4
You can do without symbol tables, and if you know associated with this signfrom the code in encrypting the table. In Microsoft Office Word, you can enter the hexadecimal code, then press alt + x and word processor will replace the code corresponding icon. Two icons you found on the first page in the table of characters that correspond to hex codes and 00D8 00F8.
5
Use mnemonic character codes to insert icons diameter in the html page. For example, if you put in the code document the sequence of characters ∅ or ∅, for the visitor of the page the result will look like this: ∅. Character entity ⊕ ⊕ looks like this: ⊕, ⊗ ⊗ - ⊗, Ø or Ø - Ø ø or ø - ø.

Advice 2 : How to find the diameter of a circle

The circle is called a geometric figure in the plane consisting of all points in this plane are equidistant from a given point. Given the point is called the center of the circle, and the distance at which points of a circle are its center, radius of the circle. The region of the plane bounded by a circle called the circle.There are several methods of calculating the diameter of a circle, the choice of the specific depends on the available original data.
How to find the diameter of a circle
Instruction
1
In the simplest case, if you construct a circle of radius R, then its diameter will be equal to
D = 2 * R
If the radius of the circle is not known, but is known for its length, the diameter can be calculated according to the formula of length of circumference
D = L/N where L is the length of the circumference, N is the number of P.
The diameter of the circle can be calculated by knowing the area of a circle it limited
D = 2 * v(S/P), where S is the area of a circle, N is the number of P.
How to know the diameter <strong>circle</strong>
2
In special cases the radius of the circle can be found if it is described or inscribed in a triangle.
If the circle inscribed in a triangle, then its radius is given by
R = S/p where S is the area of a triangle, p = (a + b + c)/2 – properiter triangle.
How to know the diameter <strong>circle</strong>
3
For the circledescribed about a triangle, the formula for the radius has the form
R = (a * b * c)/4 * S, where S is the area of a triangle.
How to know the diameter <strong>circle</strong>
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