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劉虹圻 垂心
Author:
呂麗珠
Topic:
Orthocenter
GeoGebra
New Resources
異分母分數減法
三位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
Discover Resources
固定三角形的條件−題2
帥哥的創舉 <3
Apollonius Problem 7 CCP Inversion simple 34
example 1_sun
勒洛四面体（拼接法）
Discover Topics
Line Segment
Cosine
Stochastic Process or Random Process
Arithmetic Operations
LCM and GCD