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圓周 (圖形D)
Author:
Keith Ko
移動右圖中的紅線到左方虛線，就知道它是相等於左圖的哪條線。
GeoGebra
New Resources
Nested spiral octagon
直角坐標平面上的旋轉變換
畫出對稱圖形
找出對稱軸
Fibonacci Clock
Discover Resources
測試: f(x)=sin(ax)+b 練習
函數愛心
畢氏定理(面積平移)
P4面積
P.5_FRACTION_NPMPS
Discover Topics
Curve Sketching
Pythagoras or Pythagorean Theorem
Sphere
Percentages
Definite Integral