But consider: a three legged chair won't wobble
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My maths teacher said this every time that he wanted to explain that 3 points define a Plan.
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Milking stools, however, have 3 legs. Because the cow has got the udder
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In my Area Milking stools got one leg; whit your own two legs you form a three leg stool! Better not get drunk before go to work ;)
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Because a two-legged chair would be awkward
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They are also easier to stack/store/ship economically with minimal empty space.
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You can tile a plane with triangles, so that's not a reason.
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Considering the angle of the text you wrote, you are an optimist :-)pic.twitter.com/9sZbUU9lYp
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While three leg chair always stable on uneven floor, possible to turn four leg chair on continuous floor so it does not wobble. Proof by continuity and turning position from legs at points ABCD to BCDA.
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It's harder than you think - i think the angle of that rear leg plays a role
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