> 数学 >
如图 
AM
=
1
3
AB
 
AN
=
1
3
AC
.求证:
MN
=
1
3
BC

人气:381 ℃ 时间:2019-10-17 01:55:16
解答
证明:∵
AM
=
1
3
AB
 
AN
=
1
3
AC

MN
=
AN
-
AM
=
1
3
(
AC
-
AB
)=
1
3
BC
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