AE |
1 |
3 |
AB |
AF |
1 |
4 |
AD |
AB |
a |
AD |
b |
AG |
A.
| B.
| C.
| D.
|
AG |
AB |
AF |
AG |
a |
1-x |
4 |
b |
AG |
AE |
AC |
AG |
y |
3 |
a |
a |
b |
2 |
3 |
a |
b |
a |
1-x |
4 |
2 |
3 |
a |
b |
a |
b |
|
3 |
7 |
AG |
3 |
7 |
a |
1 |
7 |
b |
AD |
BC |
CE |
EB |
AD |
AE |
AB |
a |
AE |
b |
CD |
A.
| B.
| C.
| D.
|
AB |
BC |
CA |
AB |
AC |
BD |
CD |
OA |
OD |
AD |
NQ |
QP |
MN |
MP |
0 |
A.1 | B.2 | C.3 | D.4 |
AB |
i |
AD |
j |
DE |
A.
| B.-
| C.
| D.-
|
AB |
CD |
0 |
AB |
BC |
A.菱形 | B.直角梯形 | C.矩形 | D.等腰梯形 |
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