Réponse:
1/Ikn= 180-(ink+kin)
ikn=180-(51+62)
ikn=180-113
ikn=67°
2/ on a jl est parallele a kn donc ijl= ikn=67°
et on a ilj=ink= 51°
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Réponse:
1/Ikn= 180-(ink+kin)
ikn=180-(51+62)
ikn=180-113
ikn=67°
2/ on a jl est parallele a kn donc ijl= ikn=67°
et on a ilj=ink= 51°