![[공부계] 적분](https://pbs.twimg.com/profile_images/1159286529002364928/3YaVcYDr_normal.jpg)
I should also mention that all parabolas have to be identical .. oops
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Mind if I use this in my dual credit PreCal class next week? We're working with conic sections and parabolas are on deck
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sure thing
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Nice ! Here's a
#MathGIF attempt to explain why it works. 1) Pink parabola as locus : points equidistant from a line (directrix), and a fixed point (focus). 2) flip the parabola wrt the yellow straight line which is also the tangent to the parabola. https://twitter.com/InertialObservr/status/1185669677944471552 …pic.twitter.com/CrPCmiCPEcThanks. Twitter will use this to make your timeline better. UndoUndo
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Trivial consequence of green and purple segments being always equal.pic.twitter.com/4nuDuRJyqi
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Which line is none other than the directrix (of the lower parabola).
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Is there a 3D analog? Oh yeah those funny rollimg bodies..https://youtu.be/wb29-ULRBaE
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Thank you, this is the only thing on Twitter right now that isn't giving me a panic attack.
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Whoa!
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