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三垂線定理
Author:
詠甯
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邊形的特性
錐體建築師
【案例】2018年全国1卷理科12题
第八周作业
Discover Resources
Polygon Activity
指數圖形的平移
弧度與角度
橢圓
网易
Discover Topics
Circumcircle or Circumscribed Circle
Optimization Problems
Logarithmic Functions
Surface
Tangent Line or Tangent