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诱导公式六（90°-α）
Author:
桃篮翁
GeoGebra
New Resources
算柱 (兩位數)
找出對稱軸
sanjiaohanshu
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
Discover Resources
包含除法（1 ÷分數）
平行四邊形柱展開
Slope
Congruent and Similarity
直线和圆的位置关系
Discover Topics
Derivative
Scalene Triangles
Histogram
Vectors 3D (Three-Dimensional)
Fractal Geometry