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S4E13方圆镜面错觉
Author:
宋晓燕
GeoGebra
New Resources
平行線的判定
科氏力 (Coriolis Force)
第八周作业
斐波那契螺旋弧线（表格法-可动态调节）
第三周作业效果演示
Discover Resources
Bisects Chord
拼出三角形的副本
勾股定理的证明
Twghmkc_算柱
平面直角坐标系的构成
Discover Topics
Arithmetic Operations
Straight Lines
Sphere
Pyramid
Symmetry