That’s why I only fall in love with dots.

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# Math is sad

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7 thoughts on “Math is sad”

That’s why I only fall in love with dots.

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MikeIt ignores skewed lines and lines that are the same.

tudzaIs it correct to say that if your parallel lines are on a sphere they meet twice?

nmp303No. If they are parallel, they never meet.

Think of the Earth’s circles of latitude. They are all parallel, but never cross. The circles of longitude, on the other hand, each cross all the other circles of longitude exactly twice: once at each pole.

Mancub0There are no parallel lines on earth’s surface, because all lines cross. All lines are geodesics. ‘Lines’ of latitude except the equator are not actually lines, because they are not the shortest distance between two points.

Mancub0All lines, *on earth, are geodesics.

Vincent PovirkPlease credit Cowbirds in Love for this image.

nsThis is why I choose a projective or spherical geometry.