a |
b |
a |
b |
a |
b |
π |
3 |
AB |
a |
b |
AC |
a |
b |
AD |
A.12 | B.2
| C.5-
| D.2
|
a |
b |
a |
b |
π |
3 |
a |
b |
a |
b |
AB |
a |
b |
AC |
a |
b |
AD |
1 |
2 |
AB |
AC |
a |
b |
AD |
a |
b |
a |
b |
AD |
3 |
PQ |
a |
b |
c |
a |
b |
2 |
b |
a |
1 |
2 |
a |
c |
b |
c |
c |
a |
b |
a |
b |
a |
b |
2 |
a |
a |
b |
b |
A.1 | B.2 | C.4 | D.
|
a |
b |
a |
b |
a |
b |
x1+y1 |
x2+y2 |
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