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轨迹2016.4.16
Author:
DongHai Zhang
三角形内心
GeoGebra
New Resources
球體建築師
兩組對邊相等和有直角的四邊形
錐體建築師
畫出對稱圖形
異分母分數減法
Discover Resources
與三個半圓相切的圓不規則區域著色全
加減併式與估算
No.1
第三冊2-2練習18
探究判定全等三角形的条件（ASA）
Discover Topics
Intersection
Straight Lines
Real Numbers
Normal Distribution
Integers