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parallelgram with height 20120319
Author:
iedc
GeoGebra
New Resources
sanjiaohanshu
畫出對稱圖形
兩組對邊相等的四邊形
判斷球體
兩組對邊相等和有直角的四邊形
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根據百分率找數量（二）: 例3
隨機迷宮
向量比換面積比
Copy of 表示數線上的位置
直线倾斜角与斜率的副本
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Ratios
Pie Chart or Circle Chart
Addition
Linear Equations
Perimeter