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三角測量
Author:
1041051 陳柏維
GeoGebra
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三角函数 的副本
盈利與虧蝕
正方形雪花图案
比較五件物件的重量
活动三：应用性质
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圓柱的展開圖
Slope of perpendicular lines
testing
畢式定理 (11)
三角柱算體積
Discover Topics
Subtraction
Scalene Triangles
Sphere
Circumcircle or Circumscribed Circle
Orthocenter