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圓外切四邊形（展示可推廣到凹多邊形）
Author:
Gideon Huang
Topic:
Geometry
GeoGebra
New Resources
空间中两直线的位置关系
漂亮的摇摆曲线
祖冲之的期望：内棋与外棋
讀磅
兩位數加法
Discover Resources
判斷線型函數y=f(x)=ax+b的a值(隨機出題)
四角柱
三角形內角和
功課'
S3 Inequality
Discover Topics
Perimeter
Line Segment
Orthocenter
Cuboid
Unit Circle