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直角三角形堆疊
Author:
20800 黎玉梅
GeoGebra
New Resources
拼砌四邊形
找出對稱軸
畫出對稱圖形
兩位數除以一位數（一）
判斷球體
Discover Resources
平行四邊形面積
ghseh 二次函數描點法頂點法-2
數值滑桿_長方形1
折長方形 62326虹圻
运动的全等三角形.许兴华数学
Discover Topics
Right Triangles
Sine
Power Functions
Set Theory
Geometry