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北斗七星
Author:
阳光
Topic:
Constructions
GeoGebra
New Resources
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
兩位數除以一位數（二）
三位數除以一位數（一）
球體建築師
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平面幾何
半圓內切球內切圓
外心(劉虹圻 高二三26)
Completing the square(配方法)
微信公众号“sx880A8”第662期缅甸国旗the Republic of the Union of Myanmar
Discover Topics
Geometric Transformations
Unit Circle
Tree Diagrams
Arithmetic Mean
LCM and GCD