OC |
AB |
AC |
BC |
OA |
OC |
13 |
OB |
OC |
OC |
AB |
OC |
AB |
AC |
BC |
AC |
BC |
1 |
3 |
8 |
9 |
OA |
OC |
OA |
OC |
OA |
OC |
13 |
1 |
2 |
π |
3 |
OB |
OC |
| ||||
|
|
3sinα |
3 |
| ||
2 |
π |
6 |
2 |
a |
a |
b |
a |
b |
b |
a |
AB |
AC |
AB |
AC |
AB |
AC |
AB |
BC |
3 |
DB |
DM |
a |
b |
a |
b |
a |
b |
a |
b |
a |
2 |
b |
a |
b |
a |
b |
a |
b |
a |
b |
c |
a |
b |
c |
a |
b |
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