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凸透镜成像
Author:
软 微
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
拼砌四邊形
畫出對稱圖形
四邉形 (四年級) 教師版
Discover Resources
半圓柱
平面幾何
利用邊對摺找三角形的內心
三宅一生132 5
認識菱形的特徵
Discover Topics
Quadrilaterals
Centroid or Barycenter
Arithmetic Mean
Upper and Lower Sum or Riemann Sum
Special Points