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Sagot :

UNEMEUFDU59

Réponse :

BAC = 40°

ABC = 40x°

ACB = 3x - 17 ° (on ne peut pas changer)

VINS

Réponse :

bonjour

40 + x + 40 + 3 x - 17 = 1 80

4 x = 180 - 40 - 40 + 17

4 x = 117

x = 29.25

B= 29.25 +40 = 69.25

C = 3 * 29.25 - 17 = 70.75 °

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