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在三角形兩個邊各取一點使得三線段等長(BK=KL=CL)
Author:
黃國斌
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請觀察: 1. 相似形的概念 2. 平行的概念 3. 菱形的概念
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testfileSat Jul 14 19:06:47 CEST 20180.8081580075338114
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