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欢度春节（灯笼）
Author:
zgc112
GeoGebra
New Resources
兩位數除以一位數（一）
拼砌四邊形
兩組對邊相等和有直角的四邊形
找出對稱軸
四邊形的特性
Discover Resources
Quiz on Trigonometric Ratios 辨認三角比：測驗
過圓內c點的弦中點軌跡
三節棍問題
Copy of 劉徽的「割圓術」
平行四边形
Discover Topics
Quadratic Equations
Algebra
Cone
Congruence
Means