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三角形性質--大角對大邊、小角對小邊
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GeoGebra
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活动三：应用性质
折扣
平行線的判定
第三周作业效果演示
双心四边形
Discover Resources
繪製常數函數圖形
高中數學第三冊
congruent triangle2_provided by Mr Yeung Kar Chun
直角坐標的旋轉變換
星形线-Astroid Curve-with-Envelope Command
Discover Topics
Coordinates
Trigonometric Functions
Dilation
Addition
Perimeter