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反射定律 Law of Reflection
Author:
W.L. Wong, Albert
GeoGebra
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直角坐標平面上的旋轉變換
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
畫出對稱圖形
三位數除以一位數（一）
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與園內切且外切的圓心軌跡方程式
Quiz on Joint Variation 聯變：測驗
三次函數圖形、極值、反曲點
爱奇艺
椭球面
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