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For the bird's

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 adam
(@adam)
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Wonder why that shot was off?

 
Posted : March 16, 2016 6:36 am
(@mathteacher)
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Three points always determine one plane. Four non-coplanar points determine four planes, and wobbly chairs. Maybe all four of his are coplanar, but it would be hard to verify.

 
Posted : March 16, 2016 8:27 am