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單一波
Author:
蔡承原
GeoGebra
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兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
異分母分數減法
四邉形 (四年級) 教師版
畫出對稱圖形
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正弦定理
移動滑桿k 控制k1 k2 k3數值變化
How to reconstruct a quadrilateral farm to a triangular one with the same area?
均分除法（整數÷整數）
圆与直线的位置关系
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Rotation
Terms
Variance
Median Value
Normal Distribution