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長方形和正方形的面積_題F
Author:
phcheng
,
GeoGebra Institute of Hong Kong
GeoGebra
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兩組對邊相等和有直角的四邊形
畫出對稱圖形
兩位數除以一位數（二）
四邊形的特性
柱體建築師
Discover Resources
Fill the circle
Quiz on Projection of a Line Segment on a Plane 投影：測驗
摩天輪
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
向量阵列
Discover Topics
Complex Numbers
Geometric Distribution
Cosine
Circle
Addition