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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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直角坐標平面上的旋轉變換
錐體建築師
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
兩組對邊相等的四邊形
Discover Resources
Lab 3 Task 8: Regular Pentagon Construction
conjugate
ctr to mid perd
How to draw a decagon with ruler and compasses?
一次函数 二次函数 三角函数
Discover Topics
Arithmetic Mean
Expected Value
Derivative
Boxplot
Median Value