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If指令的應用1-1
Author:
shan chun
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
錐體建築師
兩組對邊相等的四邊形
找出對稱軸
Discover Resources
正方變十字
正方體及正四面體的對稱性質
一元二次不等式(圖解法)
PMC 2017-18
椭圆的定义
Discover Topics
Volume
Derivative
Special Points
Parallelogram
Solids or 3D Shapes