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Mathematics
Problem
In a parallelogram
P
Q
R
S
PQRS
P
QR
S
, the diagonals
P
R
PR
P
R
and
Q
S
QS
QS
intersect at
O
O
O
. Which of the following statements is always true? a)
P
Q
=
Q
R
PQ = QR
P
Q
=
QR
b)
P
R
=
Q
S
PR = QS
P
R
=
QS
c)
P
O
=
O
Q
PO = OQ
P
O
=
O
Q
d)
P
O
=
O
R
PO = OR
P
O
=
O
R
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