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GeoGebra
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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
異分母分數減法
四邊形的特性
畫出對稱圖形
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題七
優良作品4
曲柄滑塊
tetrahedron rotational symmetric
滑桿動畫示範-3(畢氏定理)
Discover Topics
Rhombus
Vectors
Frequency Distribution
Parallelogram
Sphere