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DragonCurve_2018Sep-1
Author:
David HUNG
GeoGebra
New Resources
sanjiaohanshu
直角坐標平面上的旋轉變換
拼砌四邊形
四邉形 (四年級) 教師版
近似值：有效數字
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教學－橫切面
二元一次方程式圖形
與三半圓相切之圓
多边形绕圆滚动
二倍角的余弦公式的证明
Discover Topics
Rotation
Perimeter
Reflection
Planes
Symmetry