A.等腰三角形 | B.直角三角形 |
C.等腰直角三角形 | D.任意三角形 |
a |
2c |
a2+c2-b2 |
2ac |
a |
2c |
a2+c2-b2 |
2ac |
π |
4 |
a |
b |
1 |
5 |
a |
b |
π |
4 |
π |
2 |
a |
b |
1+sinθ |
1-sinθ |
1-sinθ |
1+sinθ |
a |
b |
c |
a |
b |
c |
a |
b |
c |
AB |
BC |
AB |
BC |
AB |
BC |
a |
b |
a |
b |
1 |
5sin2α+sinαcosα |
OA |
a |
OB |
b |
OC |
c |
a |
b |
c |
a |
b |
c |
a |
b |
b |
c |
c |
a |
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