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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
71% (01:26) correct
29%
(01:47)
wrong
based on 195
sessions
History
Date
Time
Result
Not Attempted Yet
Attachment:
Untitled.png [ 10.62 KiB | Viewed 21782 times ]
(Note: figure not drawn to scale.)
A. 30°
B. 40°
C. 50°
D. 60°
E. 70°
Attachment:
File comment: Question
12.jpg [ 39.5 KiB | Viewed 20202 times ]
Answer given by software looks wrong to me, according to the property that, when we have equal sides there opposite angles should be equal. and if we solve this problem it should be 30, but software gives different answer, If I really pointed out mistake of 800Score flash CAT then I deserve few kudos 12.jpg [ 39.5 KiB | Viewed 20202 times ]
or else any one can correct me 
02 Jun 2014, 17:03
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I got B as the answer.
AD=DB so it is an isolate triangle. We now BAD is 50 so ABD is also 50, and ADB= 80.
If ADB=80 then BDC=100.
We also know BD=DC so it is another isolate triangle. 180-100=80, 80/2=40 for DBC and DCB.
AD=DB so it is an isolate triangle. We now BAD is 50 so ABD is also 50, and ADB= 80.
If ADB=80 then BDC=100.
We also know BD=DC so it is another isolate triangle. 180-100=80, 80/2=40 for DBC and DCB.
02 Jun 2014, 21:08
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Check out the figure given below:
Attachment:
Ques3.jpg [ 12.8 KiB | Viewed 21365 times ]
Sum of all angles in a triangle is 180 so leftover angle in ABD is 80 degrees.
BDC is then 100 degrees because it is a straight angle with ABD.
In triangle BDC, since BD = DC, both angles must be 40 degrees each.
Answer (B)
