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選擇合適的「中間人」
Author:
phcheng
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
拼砌四邊形
兩組對邊相等和有直角的四邊形
球體建築師
兩位數除以一位數（一）
四邊形的特性
Discover Resources
磁磚著色
初心者的進化
三角形三內角和
找找看三角形外接圓的圓心在哪？
Measuring areas by placing different shapes
Discover Topics
Geometric Mean
Plane Figures or Shapes
Multiplication
Sine
Cuboid