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正三角形的旋轉
Author:
李春培
正三角形的旋轉
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
第八周作业
Discover Resources
長方體旋轉
三角形内角和演示
Vector in R2
Quiz on Translation 平移變換：測驗
畢氏定理動畫
Discover Topics
Dilation
Conditional Probability
Trigonometry
Interest Calculation
Kite