The Day After

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Murderous Maths

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Emmett has been reading and re-reading and re-reading all of the Murderous Maths books, and enjoying them immensely. He told me that you can't have a right triangle with an obtuse angle in it. I, being a geek and kind of mean, said, "Well, you can't unless the triangle is on the surface of a sphere." We've talked about triangles on spheres before, but I was a bit surprised when he confidently responded, "Correct!" His dad, not to be outdone, wondered about a triangle on a hyperbolic plane (shaped like a pringle), but shortly concluded that it could only be done in spaces with positive curvature. Emmett has it coming at him from all sides...
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April 8, 2024

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My sister's husband, Dean, got the most amazing video of our eclipse. We were so very lucky to have thin clouds for most of the period of totality. Jump ahead to 4:25 to hear the crowd as we head into totality. 
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