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初中几何定理-等腰三角形三线合一
Author:
WLS
Topic:
Geometry
GeoGebra
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【案例】2018年全国1卷理科12题
垂直線的斜率
漂亮的摇摆曲线
直線的斜率
直線的斜率：水平變化 & 鉛垂變化
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方格紙上畫梯形3
直角三角形內切圓半徑
數列
各種三角形
一个三棱锥的绘图案例
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Piecewise Functions
Upper and Lower Sum or Riemann Sum
Line Segment
Curve Sketching
Incircle or Inscribed Circle