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內公切線長
Author:
luke huang
GeoGebra
New Resources
第八周作业
四邊形的特性
判斷球體
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
Discover Resources
集合運算
AREA
星星
星形工具(1060724)
Illusion-外凸的正方形
Discover Topics
Congruence
Vectors 2D (Two-Dimensional)
Square
Complex Numbers
Sequences and Series