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同旁內角---垂直平行綫
Author:
chanfushun
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（一）
球體建築師
GeoGebra笔记功能体验课件
Discover Resources
等差數列等差數列
長方體旋轉
波羅摩及多定理
Angle between 2 planes in a cube
圖形的周界 3
Discover Topics
Orthocenter
Quadratic Functions
Pyramid
Parabola
Isosceles Triangles