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Mathematics
Problem
Triangles
P
Q
R
PQR
P
QR
and
S
T
U
STU
S
T
U
satisfy
P
Q
=
S
T
PQ = ST
P
Q
=
S
T
and
P
R
=
S
U
PR = SU
P
R
=
S
U
. Which of the following additional equalities is necessary to establish the congruence of the two triangles by using the SAS criterion? a)
∠
P
Q
R
=
∠
S
T
U
\angle PQR = \angle STU
∠
P
QR
=
∠
S
T
U
b)
∠
Q
P
R
=
∠
T
S
U
\angle QPR = \angle TSU
∠
QP
R
=
∠
T
S
U
c)
∠
Q
P
R
=
∠
S
T
U
\angle QPR = \angle STU
∠
QP
R
=
∠
S
T
U
d)
∠
P
R
Q
=
∠
S
U
T
\angle PRQ = \angle SUT
∠
P
R
Q
=
∠
S
U
T
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