Question

妍

求解🙏🏻

Answer 1

✨ 最佳解答 ✨

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角平分線性質
BE : EC = BA : AC
BE : EC = 20 : 25 = 4 : 5
⇒ BE = 36 × 4/9 = 16 , EC = 36 × 5/9 = 20
DE = BD - BE = 18 - 16 = 2

妍

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