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內外角平分線的副本
Author:
Niehanyu
,
羅驥韡 (Pegasus Roe)
角平分點（圖中 C 點）會形成一個圓
GeoGebra
New Resources
找出對稱軸
算柱 (兩位數)
兩位數加法
兩組對邊相等的四邊形
兩位數除以一位數（一）
Discover Resources
弦的定理
圓周率圓周率
三比值和為一
tool1
棒形圖編輯(修改版)
Discover Topics
Addition
Difference and Slope
Cylinder
Multiplication
Angles