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Aidezsvpurgent
@Aidezsvpurgent
April 2019
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URGENT SVP JE DOIS LE RENDRE POUR MARDI VOUS POUVEZ M'AIDER SVP J'AI DEJA FAIT LA QUESTION 1
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Quantum
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On utilise le théorème de pythagore, on a:
AD²+AE²=BD²
1,6²+1,2²=BD²
2,56+1,44=BD²
BD²=4 donc BD=2m
Calcule de HD:
BD÷2=2÷2=1
On utilise le théoreme de pythagore, on a :
SD²=HD²+HS²
=1²+2,4²
=1+5,76
=6,76 donc SD=2,6m
On utilise le théorème de thalès, on a:
SF/SD=EF/AD
donc EF=AD×SF/SD
=1,6×1,95/2,6
=1,2m
1 votes
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Quantum
si tu préfère HD=BD/2=2/2=1
Quantum
alors t'as compris ?
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Verified answer
On utilise le théorème de pythagore, on a:AD²+AE²=BD²
1,6²+1,2²=BD²
2,56+1,44=BD²
BD²=4 donc BD=2m
Calcule de HD:
BD÷2=2÷2=1
On utilise le théoreme de pythagore, on a :
SD²=HD²+HS²
=1²+2,4²
=1+5,76
=6,76 donc SD=2,6m
On utilise le théorème de thalès, on a:
SF/SD=EF/AD
donc EF=AD×SF/SD
=1,6×1,95/2,6
=1,2m