# Advice 1: How to find side of a square if you know its area

When solving geometric problems it is necessary to find some value, if known to others. For example, if set to three sides of the triangle, then it is possible to calculate all of its other characteristics. However, knowing the area of a triangle, calculate the length of sides (in the General case) impossible. But if you know the area of a square, find its way very easily.
You will need
• a calculator or computer
Instruction
1
To find side of a square if you know its area, remove from the numeric value of the square of the square root. That is, find a number, square (second degree) which is equal to the area of a square. As a formula this rule is written as follows:a = √S, where a is the side length of the square
S – the area of a square.The length of a side of a square is measured in corresponding linear units. For example, if the area of a square is 16 square centimeters (cm2), the length of its side will be equal to 4 centimeters (cm).
2
To calculate the square root of the number, take the calculator (this is where the notation of mathematical functions). Type on the keyboard of the calculator the numerical value of the area of a square. Then click on the button marked as "√". The numerical value of the length of a side of a square will appear on the display of the calculator.
3
To calculate the square root on the computer, start the standard Windows calculator. Switch it to "normal" (not engineering!) . Then type the area value. Click on the button labeled as "sqrt".
4
To find side of a square with a given area you can use the program MS Excel. To do this, run the program Excel, put the cursor on any cell and click "=". Then click on this icon select the function (fx) Select from the list the function "ROOT". Then type in the window opened, the numeric value of the area of a square, and then click OK (or press Enter). The value of the square root, and thus the length of a side of a square then appears in the cell.

# Advice 2: How to calculate side of triangle

The triangle as a flat geometric figure made up of three parties that form the connection points (vertices of the) three angles. These angles and sides are connected by permanent relations, which allows one to find unknown side lengths when you have at least a minimal set of data about values of angles and lengths of other sides. Below are several ways to determine the length of sides of triangle in relation to the Euclidean plane.
Instruction
1
If the known values of the two angles (α and β) and the length of one side (C), the lengths of the other two sides can be determined, but the calculation formula will vary, depending on, adjacent both known angle to the side of known length. If Yes, then based on the theorem of sines and given the theorem about sum of angles in a triangle, the length of the side (A), which lies opposite the angle α, can be defined as the ratio of product of the sine of that angle on a known side length to the sine of the difference between the unfolded angle (180°) and the sum of the two known angles: A=sin(α)∗C/(sin(180°-α-β)). To determine the length of the third side (B) lying opposite the angle β, this formula should be changed accordingly: B=sin(β)∗C/(sin(180°-α-β)).
2
If a party (B) of known length is not between the two known angles (α and β), and is adjacent to only one of them (e.g. α), the calculation formula of the lengths of the remaining sides will change. Side (C), lying opposite the unknown angle will have a length determined by the ratio of the product of the sine of the angle of losses to the total value of all angles is 180°, the length of the known side to the sine of the angle lying opposite to it: C=sin(180°-α-β)∗B/sin(β). And the length of the third side (A) can be determined by this formula: A=sin(α)∗B/sin(β).
3
If you know the lengths of two sides (A and B) and the angle of one corner, then to find the length of a missing side you can use the theorem of cosines. If the angle of known value (γ) lies between the known sides, the length of the required side (C) is equal to the square root of the difference between the sum of the squares of the lengths of the known sides and twice the product of the lengths of these sides into the cosine of the known angle: C=√(A2+B2-2∗A∗B∗cos(γ)).

# Advice 3: How to find the computer calculator

In the Windows operating system has a program-calculatorwith which you can perform calculations of different complexity and translate values. Find it on the computer in several ways.
Instruction
1
By default, after installing the operating system, a shortcut to the calculator is automatically added to the "start menu". To call the app, press the Windows key on the keyboard or the "start" button in the lower left corner of the screen and expand all programs. In the folder "Standard" click the "Calculator" with the left mouse button.
2
In that case, if the shortcut to the application will appear in the start menu, find the calculator on their own in the directory where the original startup file. Click "My computer" and select the local drive where you installed the system. View the Windows folder. In a subfolder of the system32 folder, click with the left mouse button on the icon calc.exe.
3
Each time not to come all the way out for running the calculatorand you can create a shortcut for it in the place where you would prefer to call it. To embed the icon on your desktop, locate one of the described ways the icon of the calculatorand click the right mouse button select the context menu item "Send", and "desktop (create shortcut)".
4
Also, this icon can be placed on the quick launch toolbar on the taskbar. To do this, move the cursor to the icon of the calculatorand press the left mouse button and while holding it down, drag the icon into the area to the right of the start button on the taskbar.
5
Switch calculatora simple to engineering and back in the window of the application itself. In the menu "View" select the desired option by clicking on it with the left mouse button. Enter digits, characters and symbols can be carried out with the keyboard or using the mouse buttons.
6
If you accidentally deleted the calculator from your computer, the different versions can be found on the Internet. Follow the instructions that accompany the file to install the application on your computer. You can also use the online calculatorohms, for example, on the website at http://www.online-calculator.com.
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