| ||
2 |
1 |
2 |
3 |
m |
n |
| ||
2 |
1 |
2 |
1 |
2 |
| ||
2 |
1 |
2 |
π |
6 |
π |
6 |
π |
6 |
π |
2 |
π |
6 |
3π |
2 |
π |
3 |
5π |
6 |
π |
3 |
5π |
6 |
π |
6 |
π |
6 |
π |
6 |
π |
6 |
11π |
6 |
π |
6 |
π |
2 |
π |
3 |
m |
n |
π |
3 |
OB |
OC |
OA |
AB |
AC |
A.直角三角形或等腰三角形 |
B.等腰直角三角形 |
C.等腰三角形但不一定是直角三角形 |
D.直角三角形但不一定是等腰三角形 |
3 |
3π |
2 |
3 |
5 |
π |
2 |
. |
| . |
3 |
π |
4 |
3π |
4 |
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