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GeoGebra
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Chapter 1
Author:
mcchiu
Testing
GeoGebra
New Resources
畫出對稱圖形
Earth with coastline
第八周作业
近似值：有效數字
長方體平面投影 (Codex版)
Discover Resources
三角柱體的截面
教學－橫切面
电子表格建点
ghseh 二次函數的開口方向
等高
Discover Topics
Multiplication
Quadrilaterals
Perimeter
Diagrams
Equations