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vector addition and subtraction
Author:
sealion1215
GeoGebra
New Resources
撒针估算面积实验
龙形曲线-分形龙
活动三：应用性质
第八周作业
盈利與虧蝕
Discover Resources
斯坦納-雷米歐司(Steiner-Lehmus)定理證明三
ex 7
三角形的心
襯墊
弹簧振子的 简谐运动
Discover Topics
Planes
Translation
Geometric Distribution
Curve Sketching
Tangent Line or Tangent