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四則
Author:
周錦鋒
GeoGebra
New Resources
圓的基本性質
第八周作业
百分數及其應用
撒针估算面积实验
平行線的判定
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「相似三角形」任务5
以剪貼比較圖形大小 題1
World's Hardest Easy Geometry Problem.
equations of circle 2
Quiz on Discriminant 判別式：測驗
Discover Topics
Coordinates
Optimization Problems
Cosine
Orthocenter
Means