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證平行四邊形 (對角線互相平分) (對邊 // 且相等)
Author:
W.L. Wong, Albert
GeoGebra
New Resources
找出對稱軸
画直线等分三角形的面积
四邊形的特性
兩位數除以一位數(二)
三位數除以一位數(二)
Discover Resources
Single Line Deflection
reflectional symmetry_1
等腰三角形求角度
三角函数诱导公式的副本
椭圆的中点弦的轨迹.许兴华数学
Discover Topics
Random Experiments
Poisson Distribution
Variance
Geometric Mean
Statistical Characteristics