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心克剛共學網：展示空間中的圓
Author:
尤黎明
GeoGebra
New Resources
三位數除以一位數（一）
球體建築師
柱體建築師
兩位數加法
兩組對邊相等的四邊形
Discover Resources
圓的性質
gyzpa 用圓近似拋物線
小圓內繞大圓
椭圆内光的反射作图步骤
切線 (The Tangent Line)
Discover Topics
Set Theory
Conic Sections
Subtraction
Geometric Mean
Complex Numbers