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水下看岸边物体
Author:
褚 军
Topic:
Trigonometry
GeoGebra
New Resources
兩組對邊相等的四邊形
判斷球體
拼砌四邊形
算柱 (兩位數)
三位數除以一位數（二）
Discover Resources
Quiz on Compass Bearings 羅盤方位角：測驗
座標
滾球平台
正立方體->菱形十二面體(滑桿動畫)
數值滑桿動畫
Discover Topics
Symmetry
Isosceles Triangles
Integers
Means
Linear Regression