OA |
BC |
OB |
CA |
OC |
AB |
A.△ABCK的三条高线的交点 |
B.△ABCK的三条中线的交点 |
C.△的三条边的垂直平分线的交点 |
D.△的三条内角平分线的交点 |
OA |
a |
OB |
b |
OC |
c |
BC |
c |
b |
CA |
a |
c |
AB |
b |
a |
OA |
BC |
OB |
CA |
OC |
AB |
a |
c |
b |
b |
a |
c |
c |
b |
a |
c |
b |
a |
c |
OC |
AB |
AB |
OC |
6 |
5 |
π |
2 |
5 |
6 |
PA |
PO |
PA |
PO |
π |
4 |
y2 |
4 |
OM |
OA |
OB |
3 |
3 |
PF1 |
PF2 |
a |
b |
c |
0 |
a |
b |
c |
a |
b |
A.至多有一个解 | B.至少有一个解 |
C.至多有两个解 | D.可能有无数个解 |
OA |
OB |
OA |
OB |
π |
4 |
π |
4 |
π |
4 |
OA |
OB |
3 |
5 |
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