A) AB : BD = 1 : 1
B) AB : BD = 1 : 2
C) AB : BD = 2 : 1
D) AB : BD = 3 : 2
Correct Answer: C
Solution :
[c] \[\because \]\[\Delta ABC\]is equilateral and \[AD\bot BC.\] \[\therefore \] \[BD=DC=\frac{1}{4}\,BC\] Now, \[AB:BD=AB:\frac{1}{2}\] \[BC=1:\frac{1}{2}\] \[(\because AB=AC)\] \[AB:BD=2:1\] |
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