AB |
a |
AC |
b |
BD |
a |
b |
BD |
BC |
AD |
AB |
BD |
AB |
2 |
3 |
BC |
AB |
2 |
3 |
AC |
AB |
1 |
3 |
AB |
2 |
3 |
AC |
1 |
3 |
a |
2 |
3 |
b |
BD |
BC |
BC |
BD |
BC |
BC |
AD |
AB |
BC |
BC |
AB |
AC |
AB |
AC |
AB |
AB |
AC |
AB |
a |
b |
a |
b |
b |
a |
a |
| ||||||||
|
4-2cos120° |
1-2×2×cos120°+4 |
5 |
7 |
PA |
PB |
PC |
AB |
PF1 |
PF2 |
PF1 |
PF2 |
A.椭圆 | B.圆 | C.直线 | D.线段 |
OA |
2 |
OM |
OA |
OM |
OA |
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 |
6 |
5 |
π |
2 |
5 |
6 |
PA |
PO |
PA |
PO |
π |
4 |
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