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![In the figure , AD is parallel to BC, AB=5 and AD=7 cm. If [m]\angle[/](/forum/styles/gmatclub_light/imageset/icon_post_target_unread.svg "In the figure , AD is parallel to BC, AB=5 and AD=7 cm. If [m]\angle[/"){kind=icon}
12 Oct 2019, 02:59
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B
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Difficulty:
85%
(hard)
Question Stats:
47% (03:00) correct
53%
(03:00)
wrong
based on 57
sessions
History
Date
Time
Result
Not Attempted Yet
In the figure , AD is parallel to BC, AB=5 and AD=7 cm. If \(\angle\) BCD = anl=1/2 \(\angle\) BAD
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22 Oct 2019, 00:26
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KSBGC
Given,
angle BCD = 1/2 angle BAD
Let angle BCD = x
Then, BAD = 2x
In order to work out this on , one needs to draw an angle bisector from A to E on BC.
AECD is a parallelogram . Therefore , AD = EC = 7.
Since , BC and AD are parallel thus angle BAD = Angle BEA. Since , AB = 5, EB = 5 too.
BC = BE + EC = 5 + 7 = 12.
Thus B is the best option.
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30 Nov 2020, 10:01
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