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平行四边形的性质探索
Author:
蔡永志
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
球体的体积推导（优化版）
【案例】2013年安徽高考15题
找出對稱軸
畫出對稱圖形
Discover Resources
阿朗插值多項式
多項式
No. 7 of Exercise 12C
directed number_hot air balloon
Conjugate Diameter—共轭直径
向量的加法法则
Discover Topics
Cuboid
Geometric Distribution
Probability
Difference and Slope
LCM and GCD