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SWC Introduce incentre
Author:
hksiusir
GeoGebra
New Resources
双心四边形
折扣
斐波那契螺旋弧线（表格法-可动态调节）
平行線的判定
常见四边形是否是双心四边形
Discover Resources
soccer(final)
量度活動所用的時間 (時、分、秒)
二次函數
圓柱體的體積及總表面面積
圆锥截面为圆椭圆双曲线抛物线的动画显示.许兴华数学
Discover Topics
Trigonometric Functions
Fractions
Planes
Exponential Functions
Integral Calculus