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平行四邊形有甚麼特性？
Author:
Anthony OR 柯志明
Topic:
Parallelogram
English version:
http://ggbtu.be/m79826
GeoGebra
New Resources
三位數除以一位數（二）
算柱 (兩位數)
判斷球體
找出對稱軸
兩位數除以一位數（二）
Discover Resources
長方形和正方形的面積_題F
颱風暴風圈
pythLK
Equal Angles, Equal Arcs and Equal Chords
Chords of a Circle
Discover Topics
Root
Coordinates
Upper and Lower Sum or Riemann Sum
Isosceles Triangles
Circumcircle or Circumscribed Circle