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Mathematics
Mathematics
Problem
In quadrilateral
P
Q
R
S
PQRS
P
QR
S
, it is known that
P
Q
=
R
S
PQ = RS
P
Q
=
R
S
and
∠
Q
P
R
=
∠
S
R
P
\angle QPR = \angle SRP
∠
QP
R
=
∠
S
R
P
. Show that
P
Q
R
S
PQRS
P
QR
S
is a parallelogram.
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