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charlottecolyne
@charlottecolyne
January 2021
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Bonjour pouvez vous m'aider svp exo 32 merci
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florian06
UT et CB sont parallèles car AB les coupes perpendiculairement
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charlottecolyne
Merci le petit b tu arriverai a le faire
florian06
Il faut faire le théorème de pythagore
Mayouuuu
A. (CB)//(UB) car elles sont toutes les deux perpendiculaires à AB.
b. On utilise le théorème de Thalès: AC/AU = AB/AT = BC/UT
AT= 6-2 = 4m
Rapport: AT/AB = 4÷8 = 0,5
Donc d'après le théorème de Thalès UT= BC×0,5
c. UT= 2×0.5=1m
Je ne suis pas sûre du résultat.
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charlottecolyne
merci
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b. On utilise le théorème de Thalès: AC/AU = AB/AT = BC/UT
AT= 6-2 = 4m
Rapport: AT/AB = 4÷8 = 0,5
Donc d'après le théorème de Thalès UT= BC×0,5
c. UT= 2×0.5=1m
Je ne suis pas sûre du résultat.