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向量求和动画演示
Author:
孟洪刚
GeoGebra
New Resources
三位數除以一位數（一）
三位數除以一位數（二）
拼砌四邊形
錐體建築師
兩組對邊相等和有直角的四邊形
Discover Resources
excenter of triangle
平方差
平行四邊形的高
千分位分數
将三角形面积一分为二
Discover Topics
Plane Figures or Shapes
Piecewise Functions
Pythagoras or Pythagorean Theorem
Vectors 2D (Two-Dimensional)
Pie Chart or Circle Chart