20211010-线段垂直平分线的性质-212021116

Added by 212021116 4 年 ago

52 Views0 Comments0 Likes

http://m.youku.com/v_show/id_XNTgxMjE1NTczNg==.html  

20211009-正弦定理-212021097

Added by 212021097 4 年 ago

52 Views0 Comments0 Likes

211010-三角形全等的判定-212021122

Added by 212021122 4 年 ago

49 Views0 Comments0 Likes

211008-三角函数诱导公式-212040011

Added by 212040011 4 年 ago

47 Views0 Comments0 Likes

211009-等差数列前n项和-212021084

Added by 212021084 4 年 ago

43 Views0 Comments0 Likes

211009-等比数列前n项和-212040012

Added by 212040012 4 年 ago

42 Views0 Comments0 Likes