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抛物线第一定义
Author:
wangyiyao
Topic:
Conic Sections
,
Parabola
GeoGebra
New Resources
找出對稱軸
拼砌四邊形
兩位數除以一位數（二）
兩位數加法
近似值：有效數字
Discover Resources
labyrinth
平行線法
Hamid Naderi Yeganeh segment4
選擇合適的「單位」
作图模板
Discover Topics
Ratios
Straight Lines
Special Points
Angles
Combinatorics