AB |
CB |
CD |
AB |
CB |
CD |
AB |
CB |
CD |
AB |
DB |
AD |
OA |
OB |
OC |
NA |
NB |
NC |
0 |
PA |
PB |
PB |
PC |
PC |
PA |
A.重心 外心 垂心 | B.重心 外心 内心 |
C.外心 重心 垂心 | D.外心 重心 内心 |
OM |
ON |
A.平行四边形 | B.梯形 | C.等腰梯形 | D.矩形 |
OA |
OB |
OC |
BM |
MC |
OA |
OB |
OC |
OB |
x2 |
25 |
y2 |
9 |
PF1 |
PF2 |
PQ |
PF1 |
PF2 |
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