Bonjour,
Exercice 2
somme des angles d'un triangle = 180°
E= 180 - 45 - x-8
E = 127-x
x= 20
E = 127-20 => 107°
angle plat = 180°
ABC = 180 - 124 =>56°
ACB = 180 - x
BAC = 180 - 56 - 180 +x
BAC = (x-56)°
x= 100°
BAC = 100 -56 => 44°
