3 |
3 |
π |
12 |
a2+b2+c2 |
ab |
3 |
3 |
| ||
2 |
1 |
2 |
3 |
π |
6 |
π |
6 |
3 |
2π |
2 |
3 |
3 |
π |
6 |
3 |
π |
6 |
π |
2 |
π |
6 |
π |
6 |
π |
6 |
π |
6 |
5π |
12 |
π |
12 |
5π |
12 |
π |
12 |
π |
2 |
a2+b2-c2 |
ab |
AB |
AC |
AO |
A.钝角三角形 | B.锐角三角形 | C.直角三角形 | D.下能确定 |
A.正三角形 | B.等腰三角形 |
C.直角三角形 | D.等腰直角三角形 |
π |
2 |
3π |
2 |
AC |
BC |
π |
2 |
2 |
3 |
|
π |
3 |
3 |
π |
2 |
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