a+b |
2 |
S△PBC |
S△PB1C1 |
a2 | ||
(
|
(a+b)2 |
4a2 |
b2 |
a2 |
SB1C1CB |
SB2C2C1B1 |
S△PB1C1=S△PBC |
S△PB2C2-S△PB1C1 |
| ||||
|
b2+2ab-3a2 |
3b2-2ab-a2 |
(b+3a)(b-a) |
(3b+a)(b-a) |
b+3a |
3b+a |
SABB1A1 |
SA1B1B2A1 |
SDCC1D1 |
SD1C1C2D2 |
SADD1A1 |
SA1D1D2A1 |
b+3a |
3b+a |
S上棱台侧 |
S下棱台侧 |
3a+b |
a+3b |
S上棱台侧 |
S下棱台侧 |
3a+b |
a+3b |
A.
| B.
| C.
| D.
|
3 |
A.
| B.
| C.
| D.
|
© 2017-2019 超级试练试题库,All Rights Reserved.