@Lejan ;)

You can type an expression or formula into the numeric edit fields that are asking for distance or radius values.

For example when you are drawing a circle for the radius you can type 15/4*2 and the result 7.5 will be calculated for you.

Another example is if you're drawing a line, you can type <360/12 to set an angle constraint of 360/12 = 30 degree angle snap for that line.

You can also use functions like sin - for example typing in sin(45) will calculate the sin of 45 degrees. All trig functions take angles in degrees. Angle input in radians is available by prefixing the function name with an underscore character, for example: _sin(PI/4). Any of the functions on the JavaScript "Math" object are available for use, including: sin(), cos(), tan(), sqrt(), pow(), round(), random(), the constant PI, and also rad() which takes a parameter in degrees and returns it in radians, and deg() which takes a parameter in radians and returns it in degrees.

You can also type in a "relative expression" to modify the value of an edit field that has previously been initialized to some other value. To make a relative expression, start it with one of these symbols: + -- * / which will alter the value by the given amount rather than inputting a completely new value. So for instance in a grid size input field you can type /2 to modify the existing value by dividing it by 2. Note that for subtraction a double minus sign is used to avoid any conflict with entering in a regular non-relative negative value.

You can also use expressions for x,y,z point values. If your regional settings for the operating system uses a comma character as the decimal point separator for numeric values, then surround each coordinate with parentheses to separate them, for example: (2+2)(5/2-1)(5).


So just Press TAB and write (1+ sqrt(5))/2 and you will obtain 1.618034
Moi write only 6 decimals on external but must calculate on more in internal


You can do that before draw a line or after
- Click first point ...draw your formula (1+ sqrt(5))/2 (By TAB ...) click the second point aligned on any direction
or
- Draw any line : Select it and click on the Dialog Info Box (Right top corner pannel) write the formula inside the Length box

So for a Rectangle with a diagonal = Golden number (it's not Golden Rectangle just a construction for apply the formula of the Golden number)
Draw an horizontal line anywhere with the formula above (will be the diagonal)
Draw any Rectangle anywhere
Transform / Orient / Line-Line
Pick 2 opposed corners of the Rectangle
and click the 2 points of the Line ;)
If all is good you must have a Rectangle with a diagonal = Golden Number ;)