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六上练习:时钟轨迹问题
Author:
肖昆明
GeoGebra
New Resources
撒针估算面积实验
百分數及其應用
龙形曲线-分形龙
斐波那契螺旋弧线(表格法-可动态调节)
折扣
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Trigonometric Ratios: Sine 三角比:正弦
蝴蝶定理推廣證明2(交比)
聯動鐘面
Angle (Extended 2)
仙后座找北極星 (底稿)
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Calculus
Trapezoid
Parabola
Plane Figures or Shapes
Subtraction