Réponse:
on remarque que TSR = TSP
on a TSP = 180-(30+110)=180-140=40 (triangle TPS)
on a TRS = TRP
on a TRP =180-(TPR+PTR) 180-(45+(180-110))=180-(45+70)=180-115=65.
car TPR= 180 -110.
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Réponse:
on remarque que TSR = TSP
on a TSP = 180-(30+110)=180-140=40 (triangle TPS)
on a TRS = TRP
on a TRP =180-(TPR+PTR) 180-(45+(180-110))=180-(45+70)=180-115=65.
car TPR= 180 -110.