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正十二面體內接正四面體或內接正六面體
Author:
侯杰材
GeoGebra
New Resources
第八周作业
四邊形的特性
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
直角坐標平面上的旋轉變換
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task2
Apollonius Problem gergonne 2
Li Shan Lan Cone Logarithm
學測試題
指数与一次函数结合的定积分的动态演示.许兴华数学
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Percentages
LCM and GCD
Similar Triangles
Planes
Rational Numbers