| ||
6 |
2 |
2 |
|
AB |
CD |
OA |
OC |
OB |
OD |
OA |
OC |
OB |
OD |
1 |
2 |
AB2+BC2 |
1+4 |
5 |
| ||
3 |
2
| ||
3 |
| ||
6 |
| ||
2 |
AC |
2 |
| ||
2 |
PE |
OB |
CE |
BC |
PE | ||||
|
| ||||
2 |
| ||
6 |
A.∠A=∠A′,∠B=∠B′,∠C=∠C′ |
B.BC=BC′,AC=A′C′,∠B=∠B′ |
C.AC=A′C′,∠A=∠A′,∠B=∠B′ |
D.∠A=∠A′,∠B=∠C′,AC=A′C′ |
A.△ABD和△CDB的面积相等 | B.△ABD和△CDB的周长相等 |
C.∠A+∠ABD=∠C+∠CBD | D.AD∥BC,且AD=BC |
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