A.m>2 | B.m>
| C.m≥
| D.0<m≤
|
c |
a |
a2+b2-c2 |
2ab |
a2+ac-c2 |
2ab |
c |
a |
c |
a |
c |
a |
1+
| ||
2 |
1-
| ||
2 |
c |
a |
1+
| ||
2 |
A.10
| B.10
| C.100
| D.100
|
2 |
3 |
5 |
A.一定是锐角三角形 |
B.一定是直角三角形 |
C.一定是钝角三角形 |
D.可能是锐角三角形,也可能是钝角三角形 |
A.5 | B.13 | C.
| D.
|
A.60° | B.45°或135° | C.120° | D.30° |
1 |
4 |
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