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共垂心
Author:
Altmann Cho
GeoGebra
New Resources
三位數除以一位數（一）
兩位數加法
柱體建築師
找出對稱軸
畫出對稱圖形
Discover Resources
Area of Triangle_1
判斷錐體 3
start and end clock face
半圓柱(可改底面圓半徑、柱高)
直线与圆的位置关系
Discover Topics
Random Variables
Cosine
Vectors 3D (Three-Dimensional)
Fractal Geometry
Straight Lines