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正弦公式證明 (Mr. KONG)
Author:
timkong
GeoGebra
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兩組對邊相等和有直角的四邊形
拼砌四邊形
直角坐標平面上的旋轉變換
三位數除以一位數（二）
畫出對稱圖形
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happy new year
直角坐标
盾牌(小動畫)
圖形的周界
螢橋國中 鄭毅華
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Means
Hypergeometric Distribution
Parabola
Linear Equations
Triangles