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圓周 (圖形H)
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
球体的体积推导（优化版）
錐體建築師
拼砌四邊形
【案例】2018年全国1卷理科12题
判斷球體
Discover Resources
f(x) and f(-x)
畫方格
在三角形兩個邊各取一點使得三線段等長(BK=KL=CL)
S3 Law of Indices
ghseh 二次函數描點法左右平移-6
Discover Topics
Rational Numbers
Derivative
Median Line
Step Functions
Conic Sections