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不規則圖形的周界(step4)
Author:
WYC
Topic:
Perimeter
GeoGebra
New Resources
科赫雪花
斐波那契螺旋弧线（表格法）
百分數及其應用
第三周作业效果演示
正方形雪花图案
Discover Resources
軌跡五、六︰移動點與兩直線保持相等距離(平行線/角平分線)
齿轮咬合
Rolling Star
試繪
習題0330-2017
Discover Topics
Trigonometric Functions
Rotation
Curve Sketching
Histogram
Pyramid