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find x (length , not area)
hint: consider Area(面積)
Limitation:
don't try to use similar triangle.(相似三角形)
don't try to use pyth theorem(畢氏定理)
don't try to use trico function.(三角比)
ans: 4sqrt3 = 6.93cm
Solution (i) #18 (Pyth theorem + similar tri)
Solution (ii) #20 (trico function)
[ 本帖最後由 [S]【YU】 於 13-4-2008 00:59 編輯 ] |
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