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Mathematics
Mathematics
Problem
Triangle
A
B
C
ABC
A
B
C
has side lengths
A
B
=
5
cm
AB = 5\,\text{cm}
A
B
=
5
cm
,
B
C
=
6
cm
BC = 6\,\text{cm}
B
C
=
6
cm
and
C
A
=
7
cm
CA = 7\,\text{cm}
C
A
=
7
cm
. It is given that
△
A
B
C
≅
△
D
E
F
\triangle ABC \cong \triangle DEF
△
A
B
C
≅
△
D
E
F
and
△
D
E
F
≅
△
P
Q
R
\triangle DEF \cong \triangle PQR
△
D
E
F
≅
△
P
QR
, with the order of letters showing the correspondence in each congruence statement. Find the length of side
Q
R
QR
QR
.
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