The Vitruvian man stands in a square (red) as well as in a circle (blue) with the navel as center.[br]But where exactly is the navel in the square?[br]Is de proportion between the distance foot-navel and the distance voet-head equal to [math]\varphi[/math]? [br]In other words: Is the ratio [math]\frac{radius}{side}[/math] equal to [math]\varphi[/math]?[br]With the wellknown construction of the golden ratio's it's easy to control:[br]Drag the slider and control whether the navel coincides with the 'golden' height.

The golden ratio doesn't coincide with the navel.[br]In reality the navel is lower. At most you can say that it 'approximately' coincides with [math]\varphi[/math]. 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.