AB |
AD |
AD |
1 |
2 |
AB |
AC |
AB |
AC |
AB |
AC |
AB |
AD |
AB |
1 |
2 |
AB |
AC |
1 |
2 |
AB |
1 |
2 |
AB |
AC |
1 |
2 |
BA |
1 |
2 |
a |
b |
c |
a |
b |
c |
A.2 | B.1 | C.0 | D.-1 |
AB |
AC |
AB |
BC |
AB |
a |
b |
c |
π |
2 |
π |
2 |
a |
c |
b |
a |
b |
a |
|
b |
|
A.(
| B.(
| C.
| D.|
|
CA |
CB |
AB |
AB |
A.△ABC是锐角三角形 | B.△ABC是直角三角形 |
C.△ABC是钝角三角形 | D.△ABC的形状不能确定 |
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