a |
b |
2 |
a |
b |
a |
b |
a |
b |
5 |
a |
b |
a |
a |
b |
a |
b |
a |
b |
a |
b |
|a| |
|b| |
| ||
2 |
a |
b |
2 |
a |
b |
5 |
a |
b |
a |
b |
a |
b |
a |
a |
b |
a |
a |
b |
a |
b |
a |
a |
b |
| ||||
|
| ||
2 |
π |
4 |
a |
b |
a |
b |
a |
b |
A.4 | B.
| C.-
| D.-4 |
a |
b |
a |
b |
a |
a |
a |
b |
A.-
| B.-
| C.-
| D.
|
m |
n |
a |
m |
n |
b |
m |
n |
A.30° | B.60° | C.120° | D.150° |
AB |
BC |
BC |
AC |
A.锐角三角形 | B.直角三角形 | C.钝角三角形 | D.不能确定 |
a |
b |
c |
a |
b |
d |
b |
a |
c |
d |
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