haykelly5 作品

多边形外角和 by Kelly Haydukewich

2014-09-12 23:51

补角三角函数关系探索

2014-10-03 00:39

正弦定理鱼竿模型

2014-10-07 00:31

多边形的角性质 by Kelly Haydukewich

2014-09-13 01:45

正弦定律 by Kelly Haydukewich

2014-10-07 01:12