[理工] [靜力]-力平衡
http://picasaweb.google.com.tw/SingJheng/kYGZFC#5392127657532792914
感覺很簡單的一題,不過就是想不到,
想請教大家一下,在解答中線段DG的長度為什麼是0.5?
我高中數學要重修了嗎XD
謝謝大家!
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