OA |
a |
OC |
c |
OB |
b |
π |
2 |
a |
b |
a |
OB |
OC |
OA |
OC |
3 |
a |
b |
a |
a |
b |
a |
1 |
2 |
π |
2 |
π |
3 |
OB |
OC |
OA |
OC |
3 |
1 |
2 |
| ||
2 |
| ||
2 |
1 |
2 |
OA |
OB |
OA |
OB |
1 |
2 |
OA |
OB |
1 |
2 |
m |
m |
n |
3 |
m |
n |
2 |
a |
2 |
a |
A.8 | B.7 | C.4
| D.4
|
m |
n |
π |
6 |
m |
n |
π |
3 |
AE |
BF |
w |
v |
5 |
w |
5 |
5 |
v |
w |
v |
w |
v |
w |
w |
u |
v |
w |
u |
a2+b2 |
v |
w |
PA |
PB |
A.12 | B.0 | C.-12 | D.4 |
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