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冲关选18
Author:
黄旭
GeoGebra
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常见四边形是否是双心四边形
折扣
百分數及其應用
比較五件物件的重量
平行線的判定
Discover Resources
共點線1
conjugate
中點軌跡(動點在兩圓上)
托勒密定理
Reflectionnn
Discover Topics
Sine
Exponential Functions
Parallelogram
Mathematics
Power Functions