Re: [中學] 兩題國二幾何

[mack (腦海裡依然記得妳)]

※ 引述《zp5000 (Lascia Ch'io Pianga)》之銘言：
: http://i.imgur.com/lPzoPxh.jpg
: 請教前輩了~
: 感謝~
        x
      45
      45 45+x
     90   90-x
         90-x
    x       2x
      x
  180-2x    180-3x
          180-3x
               6x-180
   5x-180
      5x-180
 540-10x
               540-11x
             540-11x
 21x-900           22x-900
   21x-900
                  1980-43x
3960-86x          1980-43x


   (3960-86x)*2 + x = 180
=> 7740 = 171x
=> x = 7740/171 = 2580/57 = 860/19

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