Sacred Geometry:...Diagon

I don't think I've mentioned orthogons before. So orthagons are 12 rectangles that are found through out nature and which are aesthetically pleasing. I think that the term orthagons was created by Wulfgang Von Wersin who wrote a book about the orthagons. Jay Hambridge called them (or something like them) dynamic rectangles.
Anyway the square is the first orthagon and all the rest are based on the square.
I think that the diagon is the second orthagon that I learned to draw.
The diagon starts with the square.

If you know that you'll be making more than just your original square it can be good to extend the lines up from your square.

Spread your compass to the diagonal of the square.

Draw an arc from from the top point of the square until you reach the opposite line.

The proportion between the square and the top of the arc is what makes the diagon, the ratio is 1:1.414.

 Then repeat on the opposite side.

Draw a line to mark the top of the diagon. Remember that it's best to draw the construction lines very faintly.