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Equation of the tangent to 2 circles touching externally
Author:
jleung
GeoGebra
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百分數及其應用
圓的基本性質
比較五件物件的重量
盈利與虧蝕
第八周作业2
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五邊形與三角形等積
圓錐體內切球
正立方體截痕
均分除法（整數÷整數）的副本
橢圓的副本
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Translation
Trigonometric Functions
Orthocenter
Congruence
Matrices