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向量点乘
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huhai463127310
GeoGebra
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算柱 (兩位數)
畫出對稱圖形
拼砌四邊形
判斷球體
找出對稱軸
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Pythagorean Triples 畢氏數組
Ex5D#4
Test
畫等腰直角三角形
雙曲線2 焦點法
Discover Topics
Complex Numbers
Line Segment
Real Numbers
Differential Equation
Straight Lines