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平面投影
Author:
1041051 陳柏維
GeoGebra
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画直线等分三角形的面积
漂亮的摇摆曲线
双心四边形
平行線的斜率
探究三角形的全等條件
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判斷柱體10
ghk106a18 三角形的外心與正方形
基础知识
固定周界的長方形的面積變化（周界是200厘米）
盈利與虧蝕
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Linear Functions
Polynomial Functions
Incircle or Inscribed Circle
Straight Lines
Linear Programming or Linear Optimization