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圓周 (圖形F)
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
找出對稱軸
拼砌四邊形
兩組對邊相等的四邊形
兩位數除以一位數（二）
兩位數加法
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圓內接四邊形任務一: 提示一
Ex5D#2
二元线性规划的图解法(18.2 例5)
纏繞圖 20180317四箴國中研習
少了一個質數One less prime number
Discover Topics
Volume
Frequency Distribution
Trapezoid
Dilation
Vectors 3D (Three-Dimensional)