16.
如图,在四边形ABCD中,∠DAB=90°,∠DCB=90°,E、F分别是BD、AC的中点,AC=6,BD=10,则EF的长为( )
| A. | 3 | B. | 4 | C. | 5 | D. | $\sqrt{7}$ |
15.
如图,菱形ABCD中,对角线AC与BD相交于点O,H为AD边的中点,BC=6cm,则OH的长为( )
| A. | 6cm | B. | 4cm | C. | 3cm | D. | 2cm |
10.
如图,△ABC沿BC边所在的直线向右平移得到△DEF,下列结论中错误的是( )
0 295360 295368 295374 295378 295384 295386 295390 295396 295398 295404 295410 295414 295416 295420 295426 295428 295434 295438 295440 295444 295446 295450 295452 295454 295455 295456 295458 295459 295460 295462 295464 295468 295470 295474 295476 295480 295486 295488 295494 295498 295500 295504 295510 295516 295518 295524 295528 295530 295536 295540 295546 295554 366461
| A. | AC∥DF | B. | ∠A=∠D | C. | AC=DF | D. | EC=CF |