Mathematics in my garden

So there it was, built from one clothesline to another, glistening in the sunlight one morning last week:

A near perfect spiderweb, demanding a better photo:

Here is  the horizontal strip, showing the variation in spacing of the spiral:

and again, with a superimposed scale. The spider is at the centre.

And now rotated, to give more detail.

Now “Get modelling!”.