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三角形三边关系
Author:
林峰
GeoGebra
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异形操场
正方形雪花图案
科赫雪花
第八周作业3
椭圆内切圆链
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探究平行四邊形面積(2)
门禁系统
探究余弦定理
Doppler Effect and Shockwave
sin(x) 的函數圖形的副本
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Triangles
Trigonometry
Cube
Constructions
Cosine