b |
a |
c |
a |
b |
c |
a |
a |
b |
A.30° | B.60° | C.120° | D.150° |
a |
b |
c |
a |
c |
a |
a |
b |
a |
a |
a |
b |
a |
a |
b |
b |
a |
1 |
2 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
b |
a |
b |
A.
| B.
| C.
| D.
|
e |
e |
e |
e |
e |
e |
e |
e |
a |
b |
a |
c |
b |
c |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
a |
b |
| ||
|
|
| ||
|
|
| ||
|
|
| ||
|
|
OF |
FQ |
1 |
2 |
| ||
2 |
OF |
FQ |
OF |
3 |
4 |
OQ |
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