2.
如图,在△ABC中,AB=AC,点D在边BC上,过点D作DF∥AC交AB于点F,过点C作CE∥AB交FD的延长线于点E.则下列结论正确的是( )
| A. | DC+DF=AB | B. | BD+DC=DF | C. | CE+DF=AB | D. | CE+DC=BD |
1.
如图,平行四边形ABCD中,P是边AD上间任意一点(除点A,D外),△ABP,△BCP,△CDP的面积分别为S1,S2,S3,则一定成立的是( )
| A. | S1+S3<S2 | B. | S1+S3>S2 | C. | S1+S3=S2 | D. | S1+S2=S3 |
19.
在?ABCD中,∠ACB=25°,现将?ABCD沿EF折叠,使点C与点A重合,点D落在G处,则∠GFE的度数( )
0 307288 307296 307302 307306 307312 307314 307318 307324 307326 307332 307338 307342 307344 307348 307354 307356 307362 307366 307368 307372 307374 307378 307380 307382 307383 307384 307386 307387 307388 307390 307392 307396 307398 307402 307404 307408 307414 307416 307422 307426 307428 307432 307438 307444 307446 307452 307456 307458 307464 307468 307474 307482 366461
| A. | 135° | B. | 120° | C. | 115° | D. | 100° |