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✨ Best Answer ✨

EとCを結ぶと、角度AEC=90°
角度BEC=36°(円周角の定理)
角度AEB=90°-36°=54°

𝙢𝙖𝙣𝙖💎

ありがとうございます!!助かりました🙇🏻‍♀️

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