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ie 9
Author:
LAM YU SANG
GeoGebra
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【案例】2013年安徽高考15题
球體建築師
兩組對邊相等和有直角的四邊形
三位數除以一位數(二)
三位數除以一位數(一)
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Trigonometric Ratios: Sine 三角比:正弦
數學傳播39卷4期, 平面幾何公式思考
閱讀鐘面
圖形的周界
两角差的正弦公式证明1
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Differential Calculus
Cube
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