白板报 数学集锦 / 03.14
HACKER NEWS / REDDIT

圆周率集锦

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3,211–3,240 / 13,083 条 · 第 108 / 437 页
  5. Hacker News历史与文化2015-03-141 分2 回复

    Happy Pi Day

  15. Reddit · r/Showerthoughts证明与性质

    证明与性质 · 评论中的圆周率

    讨论串 · In school math they teach a lot 'how' (E.g How to find the area of a circle) but they don't teach 'why?' (E.g Why does R^2*Pi equal the area of a circle?) This is the whole problem with the education system. They teach…

    6 条相关评论
  18. Reddit · r/askscience定义与几何

    定义与几何 · 评论中的圆周率

    讨论串 · Why is the speed of light, the speed it is?

    30 条相关评论
  20. Reddit · r/todayilearned定义与几何

    定义与几何 · 评论中的圆周率

    讨论串 · TIL If you have a rope long enough to wrap around the entire circumference of the globe. The rope is 24,901.55 miles long. If you now want to lengthen the rope so that it can hover one foot off the ground at all points…

    7 条相关评论