| ||
4 |
a+c |
b |
1 |
2 |
| ||
4 |
2
| ||
3 |
a2+c2-b2 |
2ac |
| ||
3 |
3 |
2π |
3 |
a+c |
b |
sinA+sinC |
sinB |
2π |
3 |
a+c |
b |
2
| ||
3 |
2
| ||
3 |
π |
3 |
2
| ||
3 |
π |
3 |
π |
3 |
2
| ||
3 |
π |
3 |
π |
3 |
π |
3 |
2π |
3 |
π |
3 |
| ||
2 |
a+c |
b |
2
| ||
3 |
3 |
A |
2 |
| ||
5 |
π |
2 |
2 |
2 |
A.B>45° | B.A>45° | C.b>a | D.b<a |
A.b=20,A=45°,C=80° | B.a=30,c=28,B=60° |
C.a=12,c=15,A=120° | D.a=14,c=16,A=45° |
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