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Openai/694f3cf5-8aa0-8005-b99d-6d3d0de02934
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=== Assistant: この図のグレーの面積は === この図のグレーの面積は 64−16π cm264 - 16\pi\ \text{cm}^264−16π cm2 で合っています ✅ ===== - 正方形の一辺:8 cm → 面積 8×8=648×8 = 648×8=64 ===== * 中にある曲線は 半径4 cm・中心角90°のおうぎ形が4つ分 * おうぎ形4つ分 = 半径4 cmの円1個分 👉 円の面積 π×42=16π\pi × 4^2 = 16\piπ×42=16π ===== グレー部分=正方形−円=64−16π\text{グレー部分} ===== = \text{正方形} - \text{円} = 64 - 16\piグレー部分=正方形−円=64−16π 📌 答え:64−16π cm2\boxed{64 - 16\pi\ \text{cm}^2}64−16π cm2 前の問題と違って、今回は 「正方形 − 円」に一気にまとめられるのがポイントです。
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