如图,mn分别是线段ab、bc的中点、ac=10根据图形和所给条件填空
问题描述:
如图,mn分别是线段ab、bc的中点、ac=10根据图形和所给条件填空
|______|______|_____|_____|
A.M.B.N.C
bm=( )=1/2 ( )
bn=( )=1/2 ( )
bm+bn=1/2( )+1/2( ) =1/2[( )+( )]=1/2( )
mn=( )
答
bm=(ma )=1/2 (ba )
bn=(nc )=1/2 (bc )
bm+bn=1/2(ba )+1/2(bc ) =1/2[(ba )+(bc )]=1/2(ac )
mn=( 5 )