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△ A B E △ABE 、 △ A C E △ACE 的內切圓半徑分別為 r 2與 r 1,兩者 可以互換嗎
Author:
ALICE
GeoGebra
數學傳播-156期:一組平面幾何公式的思考 圖一
http://web.math.sinica.edu.tw/mathmedia/HTMLarticle.jsp?mID=39412
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