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拋物面的光學性質
Author:
宋政蒲
GeoGebra
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球體建築師
画直线等分三角形的面积
異分母分數減法
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
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先估算，後看解釋
正五角柱展開
滑桿
Trigonometric Ratios of Any Angle
畫三角形 題1a 的複本
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Ellipse
Unit Circle
Limits
Straight Lines
Plane Figures or Shapes