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多項式乘法
Author:
陳柄何
GeoGebra
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兩位數除以一位數（一）
錐體建築師
判斷球體
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
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教學－橫切面
小數乘法
Redefining Trigonometry by a Unit Circle
餘弦定理修正項及風車證明
用平方差公式做因式分解
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Reflection
Division
Trigonometry
Square
Circle