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平行四邊形的高
Author:
whtong
GeoGebra
New Resources
判斷球體
拼砌四邊形
三位數除以一位數（二）
兩組對邊相等的四邊形
畫出對稱圖形
Discover Resources
路徑四動畫
等腰三角形
球面上的座標架
乘法運算
小一
Discover Topics
Conditional Probability
Real Numbers
Random Variables
Pie Chart or Circle Chart
Linear Equations