Dau 50 p plus coroana va roggg urgentt
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Răspuns:
Explicație pas cu pas:
∡AOB=60°
∡BOC=3/2·∡AOB=3/2·60°=90° ⇒
∡AOC=360°-∡AOB-∡BOC=360°-60°-90°=210°
∡AOC=210°