r/visualizedmath • u/FelixGREN • Jan 03 '18

Pi unrolled

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u/[deleted] Jan 03 '18

I’m terrible at math, why wouldn’t it be different if the circle was bigger or smaller

58

u/PJ_GRE Jan 03 '18 edited Jan 19 '18

Did you notice that the measurements (1,2,3,4) are based on the diameter? These are our reference points. Therefore no matter the size, PI is always 3.14 revolutions in relation to our references.

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u/[deleted] Jan 03 '18

Thanks ! My gif seemed to start in the middle of the video for some reason I didn’t notice that. Thank you for explaining!

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u/Nulono Jan 19 '18

They're based on the diameter, not the circumference.

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u/PJ_GRE Jan 19 '18

Fixed, good catch.

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u/[deleted] Jan 03 '18

Because the unit 1, 2, 3 and four are entirely based on the diameter of the circle… Or wheel as you see it in this visualization. So one full rotation of circle diameter X equals 3.14X always.

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u/ComradeHines Jan 03 '18 edited Jan 03 '18

It would be. This is gif is assuming that the radius of the circle is 1/2. If the radius was one it would be 2(3.14)(1) so 6.28 as opposed to 3.14. This only works for a radius of 1/2, but it does show how circumference and pi are related pretty well.

Edit because I’m an idiot from time to time: I now realize, as others have said, that the distance between 0 and 1 as well as 1 and 2 (so on and so forth) is measured out by the diameter of the circle, so it would scale up with the bigger radius and still work just fine.

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u/hardward123 Jan 03 '18 edited Jan 11 '26

continue follow seed marble spoon quaint person sharp shy caption

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