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地科模型–日照長短
Author:
dunst kang
GeoGebra
New Resources
兩位數除以一位數（二）
拼砌四邊形
兩組對邊相等和有直角的四邊形
判斷球體
異分母分數減法
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Lituus
雙心運動
gjc090c21內切圓的圓心
螢橋國中 陳虹璇
橢圓摺紙
Discover Topics
Multiplication
Division
Rotation
Special Points
Incircle or Inscribed Circle