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将军饮马 之动点
Author:
夜雨嘀嗒
GeoGebra
New Resources
四邉形 (四年級) 教師版
畫出對稱圖形
Nested spiral octagon
找出對稱軸
近似值：有效數字
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排列組合
黃金螺線螢橋國中80303林心怡
常數函數的平移(基本)
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
八芒星
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Integers
Sine
Parabola
Trigonometric Functions
Addition