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将军饮马
Author:
辛贺华
GeoGebra
New Resources
直線的斜率：水平變化 & 鉛垂變化
盈利與虧蝕
活动三：应用性质
三角函数 的副本
双心四边形
Discover Resources
angle
體積
ttttt
Kumamon
一次函数
Discover Topics
Optimization Problems
Quadrilaterals
Histogram
Curve Sketching
Congruence