construction golden ratio
The Vitruvian man stands in a square (red) as well as in a circle (blue) with the navel as center.
But where exactly is the navel in the square?
Is de proportion between the distance foot-navel and the distance voet-head equal to ?
In other words: Is the ratio equal to ?
With the wellknown construction of the golden ratio's it's easy to control:
Drag the slider and control whether the navel coincides with the 'golden' height.
Oops...
The golden ratio doesn't coincide with the navel.
In reality the navel is lower. At most you can say that it 'approximately' coincides with . Persevering that da Vinci's drawing is a clear evidence of the golden ratio is either denying the light of the sun either a serious insult to da Vinci. The construction of the golden ratio is so easy that, if he had wished so, a genious as da Vinci would have placed it at that exact point without any problem.