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相似三角形
Author:
李春培
Topic:
Similar Triangles
,
Triangles
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
【案例】圆柱体内放置一个大球六个小球
画直线等分三角形的面积
三位數除以一位數（一）
Discover Resources
估算分數對應的百分數
Geometry: Plane Figures (幾何： 平面圖像)
垂心
operation of matrix
巧算周界
Discover Topics
Vectors 2D (Two-Dimensional)
Rhombus
Centroid or Barycenter
Difference and Slope
Straight Lines