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三角函數的由來
Author:
陳政任
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
兩組對邊相等和有直角的四邊形
找出對稱軸
三位數除以一位數（一）
Discover Resources
探究平行四邊形面積(2)
Testing 20170308
transformation_translation
Locus (Two points 2)
鸚鵡螺旋線
Discover Topics
Cosine
Straight Lines
Symmetry
Exponential Functions
Arithmetic Operations