Mathematics
Junior High
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✨ Best Answer ✨

CD=xとおく
三平方の定理より
12^2-(15-x)^2=9^2-x^2

🍭Tzuyu🍭

ありがとうございます😊

🍭Tzuyu🍭

5.4cmで⭕️ですか?

effort

正解です⭕️

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