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楕圆第一类定义与准线
Author:
WLS
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
第八周作业3
撒针估算面积实验
圓的基本性質
活动三：应用性质
Discover Resources
tccs work
內外角平分線
World's Hardest Easy Geometry Problem.
除法2
雙曲線1 交點法
Discover Topics
Dilation
Reflection
Prism
Angles
Similar Triangles