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Mathematics
Mathematics
Problem
If
△
A
B
C
≅
△
P
Q
R
\triangle ABC \cong \triangle PQR
△
A
B
C
≅
△
P
QR
under the correspondence
A
↔
P
,
B
↔
Q
,
C
↔
R
A\leftrightarrow P,\;B\leftrightarrow Q,\;C\leftrightarrow R
A
↔
P
,
B
↔
Q
,
C
↔
R
, which angle of
△
P
Q
R
\triangle PQR
△
P
QR
is equal to
∠
B
\angle B
∠
B
of
△
A
B
C
\triangle ABC
△
A
B
C
? a)
∠
Q
P
R
\angle QPR
∠
QP
R
b)
∠
P
\angle P
∠
P
c)
∠
Q
\angle Q
∠
Q
d)
∠
R
\angle R
∠
R
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