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S0G38 三角形的內心
Author:
学用数学
GeoGebra
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兩組對邊相等和有直角的四邊形
算柱 (兩位數)
第八周作业
Nested spiral octagon
找出對稱軸
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物件平移的概念
五角錐體
正立方體與平面的截面
橢圓3--平行四邊形法
结果10以内加法
Discover Topics
Median Line
Dilation
Cuboid
Scalene Triangles
Circumcircle or Circumscribed Circle