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平行四邊形
Author:
李春培
Topic:
Parallelogram
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
兩組對邊相等的四邊形
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
Discover Resources
李洲意
圓切三半圓
vertex of quadratic function
圖形C
畢氏數
Discover Topics
Circle
Logarithmic Functions
Matrices
Derivative
Special Points