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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
畫出對稱圖形
球體建築師
Fibonacci Clock
長方體平面投影 (Codex版)
算柱 (兩位數)
Discover Resources
平行四边形面积演示
周界4B (1)
橢圓
三節棍
畫鐘面的副本
Discover Topics
Line Segment
Binomial Distribution
Random Experiments
Pythagoras or Pythagorean Theorem
Statistical Characteristics