The title of my drawing is "The Man in the Squared Circle". By this I refer to the circumference of the circle which is "Squared" to equal the perimeter of the square. With the navel being the center of the circle and at the "Golden Section" of the height of the square, the man is placed within the square, his height being equal to the side of the square, which is also equal to one-fourth of the circumference of the circle. The diameter of the circle is equal to forty (40) head-fourth units and the side of the square, or the height of the man, is the "Pi" equivalence of 31.416 head-fourths (10 Pi). This ratio of (40) divided by (10 Pi) or (4/Pi) between the square and the circle, then becomes the key relationship of the ancient canon, symbolizing the duo-nature - the spirit (or circle) and the body (the square), which make up the soul of man. (See: D&C 88:15-16) Hence, all of the unit measurements of the height of the human figure are units which are based upon the divisions of the circumference of the circle in relation to Pi and also Phi -"The Golden Section".

There is much more to this post. Source: http://academysacredgeometry.com/courses/mysteries-vitruvian-man