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轨迹与最值问题17
Author:
万超杰
GeoGebra
New Resources
中华人民共和国国旗
折扣
平行線的判定
斐波那契螺旋弧线（表格法-可动态调节）
异形操场
Discover Resources
圓周 (圖形I)
進階二
DSE Circle-ACT01B Relationship between Centre and Chord
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三角形三边关系
Discover Topics
Symmetry
Subtraction
Sequences and Series
Optimization Problems
Polygons