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Nonochou971
@Nonochou971
May 2019
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Bjr pouvez vous aidez svp a faire les exercices 54 et 55
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Bonjour
la somme des angles d'un triangle = 180 °
angle BDA = 180 - (67 + 56) =
57 °
les points BDC forment un angle plat donc 180 °
l'angle ADC = 180 - 57 =
123 °
angle DAC = 180 - ( 123 + 22) =
35 °
dans un triangle isocèle, les angles de la base sont égaux donc angle ABC = 61 ° et angle BAC = 180 - 122 =
58 °
DEF + DFE = 180 - 48 = 132 ° donc chaque angle mesure 132 : 2 =
66 °
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Bonjourla somme des angles d'un triangle = 180 °
angle BDA = 180 - (67 + 56) = 57 °
les points BDC forment un angle plat donc 180 °
l'angle ADC = 180 - 57 = 123 °
angle DAC = 180 - ( 123 + 22) = 35 °
dans un triangle isocèle, les angles de la base sont égaux donc angle ABC = 61 ° et angle BAC = 180 - 122 = 58 °
DEF + DFE = 180 - 48 = 132 ° donc chaque angle mesure 132 : 2 = 66 °