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Equal chords, equidistant from centre
Author:
Leo Chui
GeoGebra
New Resources
常见四边形是否是双心四边形
百分數及其應用
折扣
圓的切線方程
撒针估算面积实验
Discover Resources
some pic
橫向橢圓
圓繞圓內外
九九乘法表的認識
鉛筆畫圓
Discover Topics
Diagrams
Curve Sketching
Rotation
Cone
Congruence