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Marcy
@Marcy
April 2019
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On considere un triangle MER tel que MR=3 CM ME=3RACINE CARRE DE 3 CM ET ER = 6 CM
IL FAUT DEMONTRER LA NATURE DU TRIANGLE MER
ET CALCULER LA MESURE DE L ANGLE MRE
MERCI POUR VOTRE AIDE
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ficanas06
Verified answer
Je calcule:
MR² = 3²=9
ME²= (3V3)²= 27
ER²=6²=36
Je constate que MR² + ME²= ER² (27+9=36)
Par la réciproque du t de Thalès,
le triangle MER est rectangle en M.
L'angle MRE est égal à l'arcosinus de MR/ME:
arcos(3/6)=60
L'angle MRE mesure 60°.
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Verified answer
Je calcule:MR² = 3²=9
ME²= (3V3)²= 27
ER²=6²=36
Je constate que MR² + ME²= ER² (27+9=36)
Par la réciproque du t de Thalès, le triangle MER est rectangle en M.
L'angle MRE est égal à l'arcosinus de MR/ME:
arcos(3/6)=60
L'angle MRE mesure 60°.