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Author:
Choi King Hong
GeoGebra
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兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
拼砌四邊形
四邉形 (四年級) 教師版
兩位數除以一位數（二）
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範例：自製工具「格線」
全等三角形
正弦定理
Rounding Quiz (Significant Figures) 有效數字：測驗
上色練習
Discover Topics
Trigonometry
Root
Frequency Distribution
Conic Sections
Rectangle