Math Photo: Helical Projections
![](https://MrHonner.com/wp-content/uploads/2019/09/Helical-Projection.jpg)
A playground structure in downtown San Francisco cast some really lovely shadows that I struggled to capture.
The structure itself is a helical ramp that reminds me of a parametric surface area problem from multivariable calculus class.
![](https://MrHonner.com/wp-content/uploads/2019/09/Helical-Playground.jpg)
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