7.
如图,在Rt△ABC中,∠C=90°,∠A=26°,以点C为圆心,BC为半径的圆分别交AB、AC于点D、点E,则弧BD的度数为( )
| A. | 26° | B. | 64° | C. | 52° | D. | 128° |
6.
如图,在直角△ABC中,∠C=90°,BC=1,tanA=$\frac{1}{2}$,下列判断正确的是( )
0 279420 279428 279434 279438 279444 279446 279450 279456 279458 279464 279470 279474 279476 279480 279486 279488 279494 279498 279500 279504 279506 279510 279512 279514 279515 279516 279518 279519 279520 279522 279524 279528 279530 279534 279536 279540 279546 279548 279554 279558 279560 279564 279570 279576 279578 279584 279588 279590 279596 279600 279606 279614 366461
| A. | ∠A=30° | B. | AC=$\frac{1}{2}$ | C. | AB=2 | D. | AC=2 |