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知己
GeoGebra
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第八周作业
常见四边形是否是双心四边形
第八周作业1
平行線的判定
第八周作业2
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Trigonometric Ratios: Sine 三角比:正弦
直角三角形的三角比
方向餘弦
B3_1-5_互動例6
面積與積分值
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Power Functions
Probability
Sphere
Solids or 3D Shapes
Means