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Mathematics
Problem
In
△
P
Q
R
\triangle PQR
△
P
QR
, point
S
S
S
is the midpoint of
P
Q
PQ
P
Q
. A line through
S
S
S
is drawn parallel to
Q
R
QR
QR
and meets
P
R
PR
P
R
at
T
T
T
. Which of the following is certainly true? a)
S
T
=
Q
R
ST = QR
S
T
=
QR
b)
T
is the midpoint of
Q
R
T \text{ is the midpoint of } QR
T
is the midpoint of
QR
c)
T
is the midpoint of
P
R
T \text{ is the midpoint of } PR
T
is the midpoint of
P
R
d)
S
is the midpoint of
P
R
S \text{ is the midpoint of } PR
S
is the midpoint of
P
R
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