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侧面展开是长方形
Author:
吕玉雷
GeoGebra
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圓周公式的應用
圓的切線方程
祖冲之的期望:内棋与外棋
多邊形的面積
双心四边形
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呼拉圈
过圆上一点作切线,三步
鋪磁磚練習
诱导公式三(x轴对称关系)
F4_Ch9.1 任意角的三角比
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Random Variables
Combinatorics
Geometric Mean
Congruence
Polynomial Functions