11.
如图,?ABCD的周长为40,△BOC的周长比△AOB的周长多4,则AB的长为( )
| A. | 4 | B. | 8 | C. | 10 | D. | 12 |
8.
用尺规作∠AOB平分线的方法如下:①以点O为圆心,任意长为半径作弧交OA,OB于点C,点D;②分别以点C,点D为圆心,以大于$\frac{1}{2}$CD长为半径作弧,两弧交于点P;③作射线OP,则OP平分∠AOB,由作法得△OCP≌△ODP,其判定的依据是( )
| A. | ASA | B. | SAS | C. | AAS | D. | SSS |
7.
如图,在下列四组条件中,能得到AB∥CD的是( )
| A. | ∠ABD=∠BDC | B. | ∠3=∠4 | C. | ∠BAD+∠ABC=180° | D. | ∠1=∠2 |
6.某景点3月份接待游客25万,5月份接待64万,则平均每月的增长率x满足( )
| A. | 25(1+x)2=64 | B. | 25(1-x)2=64 | C. | 64(1+x)2=25 | D. | 64(1-x)2=25 |
5.
如图,在?ABCD中,点E在CD边上,AB=3CE,射线AE交BC边的延长线于点F,则下列结论中错误的是( )
0 285428 285436 285442 285446 285452 285454 285458 285464 285466 285472 285478 285482 285484 285488 285494 285496 285502 285506 285508 285512 285514 285518 285520 285522 285523 285524 285526 285527 285528 285530 285532 285536 285538 285542 285544 285548 285554 285556 285562 285566 285568 285572 285578 285584 285586 285592 285596 285598 285604 285608 285614 285622 366461
| A. | BF=3CF | B. | DE=2CE | C. | AE=2EF | D. | AD=3CF |