Bonjour,
Somme des angles d'un parallélogramme = 360°
BAD = (360 - 121 -121 )/2 =>59°
BCD = BAD = 59° ( angles opposés)
ABC + ADC
= 360 - 59 -59 =242
ABC = ADC = 242/2 = 121°
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Bonjour,
Somme des angles d'un parallélogramme = 360°
BAD = (360 - 121 -121 )/2 =>59°
BCD = BAD = 59° ( angles opposés)
ABC + ADC
= 360 - 59 -59 =242
ABC = ADC = 242/2 = 121°