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三角形三边关系探究
Author:
fei zhao
Topic:
Triangles
分辨率1280x720
GeoGebra
2020年7月
New Resources
球體建築師
柱體建築師
判斷球體
四邉形 (四年級) 教師版
兩位數除以一位數（二）
Discover Resources
直线与椭圆
硬幣
ycps4a1
Angle of elevation and Angle of depression(仰角和俯角)
有向數的加法
Discover Topics
Cuboid
Sine
Matrices
Similar Triangles
Straight Lines