Respostas

2013-12-05T20:37:36-02:00
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|  \ 
|    \
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|18    \ 
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|__(65°            
    x

Tg65° = 18 / x
2,1445 = 18 /x
2,1445x = 18
x = 18 / 2,1445
x = 8,39 m
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