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parallelogram
Author:
Ku, Yin Bon (Albert)
GeoGebra
New Resources
漂亮的摇摆曲线
圓的基本性質
祖冲之的期望：内棋与外棋
平行線的斜率
三角函数 的副本
Discover Resources
線型函數圖形測驗
樞紐實驗
Percentage（百分法）
中點_圓_多邊形_軌跡
平面截圆锥面
Discover Topics
Polynomial Functions
Hyperbola
Conic Sections
Trapezium
Sequences and Series