A liquid can assume the shape of any vessel in which it is stored, and this reservoir has curved borders since it would be strange indeed to find a reservoir with angled corners. I suppose a polygonal shape would be too weak to withstand the pressure that water exerts. And now I remember learning that a circle is a polygon with infinite sides, so a rounded corner could distribute the pressure and mass of water over more pressure points that can be easily counted.
All of the foregoing is a stream-of-consciousness related to my school days. The image above shows a place I gravitated toward during that era of my life. I’d go to this reservoir to walk alone and clear my mind, which was not so easy to do at that time given all of the angst and information that was stuffed into it during my teenage days.
I’d dream of what my life might be like once I was done with school. I’d imagine living in one of those apartments in that building with a view of the water. I’d have peace at a glance when I looked through the windows.
Eventually, I did move into an apartment with a balcony that overlooked a little lake (but not the one shown in this picture). I did feel peace when I looked out the windows. I lived there until my life became too large to fit in a two-bedroom apartment.