This colorful Venn diagram was a lucky find in the dollar bin. Maybe it was so cheap because it only has 12 regions, instead of the 63 that six sets should generate.
I suppose it would be more realistic if everything outside the colored region was black, and the point at the very center was white.
How much blue do you see? One-fourteenth is certainly an odd number to see around town.
I finally made it down to the new Fulton St. subway station. Such a beautiful view from below, like the slope field of a differential equation.
Each of the 88 glass blades of the Sky Reflector-Net is positioned to channel sunlight down throughout the station at different times of day and days of the year. Maybe next year I’ll stop by on the summer solstice.
The tilling station is one of my favorite exhibits at the Museum of Mathematics. These rabbit tiles create a hexagonal tiling of the plane. Pick any rabbit, and you’ll notice six rabbits all around it; this is exactly how hexagons fit together to tile the plane.
What I really like about this tiling is the the various levels of triangles that emerge. Triangles of rabbits, one of each color, mutually intersect at ears and paws. And I can’t help but seeing the monochromatic rabbit triangles!
This simple exhibit at the New York Hall of Science demonstrates a lot of interesting trigonometry. As the light hits the boundary of the semi-circular glass block, it bends back toward the central axis of the system. I can’t look at this without seeing tangents, normals, and angles of incidence and refraction. I wish I had brought my protractor!