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轨迹2016.4.16
Author:
DongHai Zhang
三角形内心
GeoGebra
New Resources
找出對稱軸
球體建築師
拼砌四邊形
兩位數加法
第八周作业
Discover Resources
簡單的回饋「笑臉」與「哭臉」
三角形的重心軌跡
Quiz on Special Lines in Triangles 三角形內的特殊線：測驗
Pythagorean Theorem Proof: Shearing
八角柱(可側轉、上下轉)
Discover Topics
Correlation
Inequalities
Pyramid
Fractions
Trapezoid