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欧拉线与三角形1
Author:
林峰
GeoGebra
New Resources
兩組對邊相等的四邊形
畫出對稱圖形
拼砌四邊形
兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
Discover Resources
卡特蘭數 (Catalan Number)
圓錐截痕
圓錐截面曲線
科赫雪花 (Koch Snowflake)
蚂蚁爬行
Discover Topics
Perimeter
Intersection
Parallelogram
Algebra
Special Points