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三角形外角和=360⁰
Author:
李春培
三角形外角和=360⁰
GeoGebra
New Resources
兩位數除以一位數（一）
錐體建築師
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
第八周作业
Discover Resources
Constructing Quadrilaterals by Four Sides (2014)
vbvbvbvc
指數函數的平移 (3)
新型軌跡
Angles in a Circle:Property 3
Discover Topics
Isosceles Triangles
Hyperbola
Cuboid
Similar Triangles
Secant Line or Secant