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定长线段在相交直线上滑动
Author:
冯伟冀
GeoGebra
New Resources
正方形雪花图案
第八周作业1
平行線的判定
科氏力 (Coriolis Force)
盈利與虧蝕
Discover Resources
分數的加法
ctr to mid perd
ghseh 二次函數動畫上下平移
Equal arcs, equal angles, equal chords
分数减法 Fraction Subtraction
Discover Topics
Rectangle
Curve Sketching
Integers
Matrices
Rhombus