PA |
θ |
2 |
OA |
θ |
2 |
CA |
PA |
PB |
PC |
θ |
2 |
θ |
2 |
PA |
OA |
CA |
OA |
OC |
PA |
OA |
OP |
OP |
OC |
PA |
PB |
PC |
OA |
OB |
OP |
OC |
OP |
OA |
OB |
OC |
OC |
OA |
OC |
OB |
OC |
OC |
1 |
2 |
a |
b |
a |
b |
a |
b |
a |
AB |
b |
BC |
c |
CD |
a |
b |
b |
c |
DB |
DA |
DC |
a |
b |
π |
4 |
π |
2 |
a |
b |
a |
b |
a |
b |
a |
b |
A.
| B.
| C.
| D.6 |
AP |
BP |
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