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Sagot :

VINS

bonsoir

CBA est isocèle

  • CBA  = 40 °
  • BCA =  70 °
  • CAB = 70 °

ABD est isocèle  

ABD = 90 - 40 =  30 °

BAD = 75 °

ADB = 75 °

Bonsoir,

BCD = BAC ( triangle isocèle)

(180 - 40)/2 =>60°

ABD = 90 - 40 => 50°

BAD = BDA ( triangle isocèle)

(180 - 50 )/2 =>65°

CAD = 60 + 65 =>125°

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