Derek 朕會功夫
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 Apr20 awarded Popular Question Mar16 awarded Announcer Feb12 awarded Critic Feb12 comment Is there a size of rectangle that retains its ratio when it's folded in half? This is exactly why the whole world use A series paper (except US, of course). Dec26 comment Why not both true and false? For the first example we know it's true because we tested every single possible input (for all) through induction. Dec22 accepted Dimensions definition? Dec20 comment Why do we need to learn Set Theory? This might as well be the actual article :) Dec20 comment Dimensions definition? @AsafKaragila - It's related, but I believe my question is more about the definition of dimension. Dec20 asked Dimensions definition? Dec15 awarded Caucus Dec13 comment Trisecting an angle Nice, thanks.­­­­­ Dec13 comment Trisecting an angle @peterwhy - Oh by work I mean a good enough approximation... like how $y=x$ is a "good enough" approximation of $y=\sin{x}$ if $x$ is small. Dec13 comment Trisecting an angle Thanks for this proof using contradiction! By the way, what program did you use to create this nice illustration? Dec13 accepted Trisecting an angle Dec13 comment Trisecting an angle I see what you mean now. Since the distance from the middle point to the middle segment is way closer than the other two, the angle in between would be much greater than the other two, so this method only works for small angles. Thanks. Dec13 revised Trisecting an angle added 66 characters in body Dec13 comment Trisecting an angle They are almost "parallel", but they aren't. With great precision trisecting the angle is still possible with this method. Dec13 asked Trisecting an angle Dec4 comment Parametrizing intersection @AmitaiYuval - Hm, thanks anyway. Dec4 comment Parametrizing intersection @AmitaiYuval - It's graded by an online computer grader on those homework sites and it says that is not the correct answer.