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轨迹19
Author:
万超杰
GeoGebra
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【案例】2018年全国1卷理科12题
異分母分數減法
兩組對邊相等和有直角的四邊形
球体的体积推导(优化版)
GeoGebra笔记功能体验课件
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相切的三圓
三角形
角錐體積-金字塔法
两角和的正弦公式几何证明(改进)
圆面积公式推导
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Probability
Numbers
Rhombus
Straight Lines
Linear Regression