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In the figure above, what is a in terms of b and c ?
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25 Jan 2020, 07:00
25 Jan 2020, 07:00
Expert Reply
00:00
A
B
C
D
E
Question Stats:
91% (00:27) correct
8% (00:58) wrong based on 34 sessions
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Attachment:
#greprepclub In the figure above.jpg [ 11.01 KiB | Viewed 2151 times ]
In the figure above, what is a in terms of b and c ?
A. 180 – b + c
B. 180 + b + c
C. b + c
D. b + c − 180
E. b + c + 180
Kudos for the right answer and explanation
Re: In the figure above, what is a in terms of b and c ?
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25 Jan 2020, 10:08
25 Jan 2020, 10:08
2
In triangle ABC,
∠ABC+∠ACB+∠BAC=180
b+c+∠BAC=180
∠BAC=180−(b+c)
DC is a straight line,
so ∠DAB+∠BAC=180
a+180−(b+c)=180
a=b+c
This is also known as the exterior angle theorem.
OA,C
In the figure above, what is a in terms of b and c ?
A. 180 – b + c
B. 180 + b + c
C. b + c
D. b + c − 180
E. b + c + 180
Kudos for the right answer and explanation
∠ABC+∠ACB+∠BAC=180
b+c+∠BAC=180
∠BAC=180−(b+c)
DC is a straight line,
so ∠DAB+∠BAC=180
a+180−(b+c)=180
a=b+c
This is also known as the exterior angle theorem.
OA,C
Carcass wrote:
Attachment:
The attachment #greprepclub In the figure above.jpg is no longer available
In the figure above, what is a in terms of b and c ?
A. 180 – b + c
B. 180 + b + c
C. b + c
D. b + c − 180
E. b + c + 180
Kudos for the right answer and explanation
Attachments
triangle.png [ 16.02 KiB | Viewed 2165 times ]
Re: In the figure above, what is a in terms of b and c ?
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17 Jul 2021, 01:56
17 Jul 2021, 01:56
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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