来自关宏超的问题
(2014•宁波南三县模拟)如图,Rt△ABC内接于半圆O,∠C=90°,AC=6,BC=8.若在CB延长线上取一点D,过点D作半圆O的切线DE,当∠BDE=∠ABC时,BD的长为()A.54B.13C.12D.34
(2014•宁波南三县模拟)如图,Rt△ABC内接于半圆O,∠C=90°,AC=6,BC=8.若在CB延长线上取一点D,过点D作半圆O的切线DE,当∠BDE=∠ABC时,BD的长为()
A.
54
B.13
C.12
D.
34
1回答
2020-12-0503:56