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相切圓之圓半徑
Author:
曾慧敏
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等的四邊形
三位數除以一位數（二）
球體建築師
【案例】圆柱体内放置一个大球六个小球
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拿破崙三角形
Surface area of sphere
HKCEE-AM 2010 Q17 additional part
小一
極線對偶定理 / polar duality theorem 的複本
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Polygons
Prism
Matrices
Tangent Line or Tangent
Percentages