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20161223 第5題
Author:
3A516057 練鴻裕
GeoGebra
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斜率的值
折扣
比較五件物件的重量
龙形曲线-分形龙2
圓的切線方程
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均分除法（整數÷整數）
扇形概念與面積
角平分線分點比例
勾股定理
S3 Ch4.3 例4.6a 三視圖(3D圖)
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Diagrams
Optimization Problems
Exponent
Interest Calculation
Planes