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Mathematics
Problem
A quadrilateral
A
B
C
D
ABCD
A
B
C
D
has diagonals
A
C
AC
A
C
and
B
D
BD
B
D
intersecting at
O
O
O
such that
A
O
=
O
C
AO = OC
A
O
=
O
C
and
B
O
=
O
D
BO = OD
B
O
=
O
D
. What type of quadrilateral is
A
B
C
D
ABCD
A
B
C
D
? Give one reason for your answer.
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