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定周长的正多边形面积变化规律（含圆）
Author:
张英华
Topic:
Area
GeoGebra
New Resources
圓的基本性質
折扣
第八周作业2
活动三：应用性质
双心四边形
Discover Resources
三角形的內心
Exponential graph
串珠(大小不同)
Copy of 製作組織圖
Hamid Naderi Yeganeh Ellipse2
Discover Topics
Logarithmic Functions
Mode
Tangent Function
Similar Triangles
Geometry