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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
異分母分數減法
兩位數加法
四邊形的特性
拼砌四邊形
三位數除以一位數（一）
Discover Resources
軸對稱
等邊三角形
圆与它的外切圆
基華小學 GeoGebra 幾何創作室 第 2 節
gjc096a19 平行四邊形內截兩扇形
Discover Topics
Dilation
Random Experiments
LCM and GCD
Upper and Lower Sum or Riemann Sum
Arithmetic Operations