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angles sum on a striaght line
Author:
LAM YU SANG
GeoGebra
New Resources
錐體建築師
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
異分母分數減法
Discover Resources
光源距離 Light Source Distance
轉移矩陣 (馬可夫鏈)
Question 2(Angle)
定周长的正多边形面积变化规律（含圆）
圆锥曲线折纸操作题（教材案例）
Discover Topics
Inequalities
Orthocenter
Logarithm
Definite Integral
Functions