Réponse:
angle EAD = angle ABC= 56°
angle ADC = angle ABC =56°
angle BCD= {360-(56+56)}÷2=124°
angle DAB=angleBCD= 124°
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Réponse:
angle EAD = angle ABC= 56°
angle ADC = angle ABC =56°
angle BCD= {360-(56+56)}÷2=124°
angle DAB=angleBCD= 124°