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圆周角与圆心角
Author:
李慧敏
Topic:
Circle
GeoGebra
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垂直線的斜率
圓的切線方程
圓的基本性質
祖冲之的期望：内棋与外棋
常见四边形是否是双心四边形
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雙曲線
特別角的三角函數值(1)
兩針夾角
立體截面
Copy of Linear Transformations
Discover Topics
Unit Circle
Mode
Cosine
Trigonometric Functions
Subtraction