<abc=<cdb=90度,ac‖bd,ab=8,bc=6.

问题描述:

<abc=<cdb=90度,ac‖bd,ab=8,bc=6.
(1):△abc∽△cdb;
(2):求cd,bd的值.
急急急……急急急……我线等

(1)
∵AC ‖BD
∴∠ACB=∠BCD
∵∠ABC =∠CDB =90°
∴△ABC∽△CDB
(2)∵AB =8,BC =6
∵△ABC∽△CDB
∴CD∶BD=AB∶BC =8∶6=4∶3