a |
b |
a |
b |
A.
| B.
| C.
| D.
|
a |
b |
a |
b |
2 |
a |
b |
a |
b |
| ||||
|
|
| ||
2 |
a |
b |
a |
b |
π |
4 |
a |
b |
a |
a |
b |
a |
b |
3 |
4 |
b |
a |
b |
1 |
4 |
a |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
A.30° | B.60° | C.120° | D.150° |
AB |
AC |
AB |
AC |
π |
4 |
3 |
a |
b |
a |
b |
π |
3 |
p |
| ||
|
|
| ||
|
|
A.1 | B.
| C.2 | D.
|
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