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椭圆内切圆链
Author:
孟宝兴
GeoGebra
New Resources
拼砌四邊形
四邊形的特性
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
Discover Resources
圓內正方形夾小圓
黎曼和
S3 Trigonometry
Ｑ５
测试
Discover Topics
Root
Means
Similar Triangles
Indefinite Integral
Vectors