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Mathematics
Mathematics
Problem
If
M
M
M
and
N
N
N
are the mid-point of the diagonals
A
C
AC
A
C
and
B
D
BD
B
D
, respectively of a quadrilateral
A
B
C
D
ABCD
A
B
C
D
, then
A
B
+
A
D
+
C
B
+
C
D
=
k
M
N
AB + AD + CB + CD = kMN
A
B
+
A
D
+
C
B
+
C
D
=
k
M
N
, where $k = \dots\dots
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