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直線之美
Author:
李春培
直線之美
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
兩位數加法
兩位數除以一位數（一）
算柱 (兩位數)
異分母分數減法
Discover Resources
waaachen
过圆上一点作切线，三步
Solving Triangles (Ambiguous SSA case)
伍四红 圆与正方形 面积同周长比较
長方形的周界與長和闊的關係 (教師版)
Discover Topics
Parallelogram
Subtraction
Expected Value
Definite Integral
Linear Functions