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在一张纸上画一些间隔为20毫米的平行线,利用直角三角形两直角边为1、斜边为2~(1/2)的特性,从火柴棍上剪下一段长度为10(2~(1/2))毫米的小木棍,以同一高度(0.5米为宜)扔到画有平行线的纸上,接连扔上许多次。把扔的总次数和火柴棍与平行线相交的次数记录下来,然后用火柴棍与平行线相交的次数除以扔的总次数,再乘以π,即可得出2~(1/2)的近似值。
Draw some parallel lines with a spacing of 20 mm on a piece of paper. Use the right-angled triangle with two right-angled sides as 1, and the hypotenuse with 2 ~ (1/2) characteristics. Cut a length from the matchstick to a length of 10 (2~ (1/2)) A small wooden stick of the same height (0.5 meters is appropriate) is thrown on paper with parallel lines and thrown many times in succession. Record the total number of throws and the number of times the matchstick intersects the parallel line. Then divide the number of times the matchstick crosses the parallel line by the total number of throws and multiply it by π to get 2~(1/2). The approximate value.