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教学素材：椭圆与双曲线
Author:
清风拂琴，陌上花开
GeoGebra
New Resources
長方體平面投影 (Codex版)
兩組對邊相等的四邊形
找出對稱軸
四邉形 (四年級) 教師版
算柱 (兩位數)
Discover Resources
尤拉線
路徑三動畫
Division Algorithm & Remainder Therorem 除法算式與餘式定理
Geometry : Basic Elements (幾何： 基本元素)
根據百分率找數量（二）: 例4的副本
Discover Topics
LCM and GCD
Differential Calculus
Addition
Volume
Dilation