D, E are midpoints of AB, AC of $ riangle ABC$. M, N are midpoints of the diagonals of trapezium BCED. Then $MN=$

Question

D, E are midpoints of AB, AC of $	riangle ABC$. M, N are midpoints of the diagonals of trapezium BCED. Then $MN=$

Accepted Answer

$\frac{1}{2}(BC-DE)$

Answer

$\frac{1}{2}(BC+DE)$

Answer

$BC-DE$

Answer

$BC+DE$

D, E are midpoints of AB, AC of △ABC\triangle ABC△ABC. M, N are midpoints of the diagonals of trapezium BCED. Then MN=MN=MN=