AD |
CD |
AB |
DA |
DC |
AC |
AB |
AC |
DA |
DC |
AC |
DA |
DC |
AD |
CD |
BD |
12 |
13 |
5 |
13 |
AB |
AC |
AB |
AB |
4 |
5 |
3 |
5 |
5 |
13 |
4 |
5 |
12 |
13 |
3 |
5 |
56 |
65 |
1 |
2 |
1 |
2 |
1 |
2 |
672 |
13 |
225 |
13 |
A.3x-5y+7=0 | B.5x-3y+1=0 | C.3x-5y-1=0 | D.5x-3y-7=0 |
AB |
AD |
AA1 |
AB |
AD |
AA1 |
AC1 |
A.5 | B.6 | C.4 | D.8 |
CB |
a |
AC |
b |
a |
b |
a |
b |
OA |
OB |
OC |
A.4a-5b=3 | B.5a-4b=3 | C.4a+5b=14 | D.5a+4b=14 |
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