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# What is the value of d? (1) a + b = 110 (2) b = 30

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Math Expert
Joined: 02 Sep 2009
Posts: 58464
What is the value of d? (1) a + b = 110 (2) b = 30  [#permalink]

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17 Oct 2019, 01:58
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(N/A)

Question Stats:

93% (00:28) correct 7% (01:06) wrong based on 14 sessions

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What is the value of d?

(1) a + b = 110
(2) b = 30

Attachment:

image011.jpg [ 2.29 KiB | Viewed 165 times ]

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Math Expert
Joined: 02 Aug 2009
Posts: 8023
Re: What is the value of d? (1) a + b = 110 (2) b = 30  [#permalink]

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17 Oct 2019, 04:53
1
Bunuel wrote:

What is the value of d?

(1) a + b = 110
(2) b = 30

Attachment:
image011.jpg

Statement I
Now a, b and c are the angles of the triangle, so a+b+c=180, but a+b=110, so c=180-110=70 and d=180-c=180-70=110. Also the exterior angle, d here, is the sum of two opposite interior angles, a and b here, so d=a+b=110
Statement II
b =30, but we require the value of a or c..

A
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Re: What is the value of d? (1) a + b = 110 (2) b = 30   [#permalink] 17 Oct 2019, 04:53
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# What is the value of d? (1) a + b = 110 (2) b = 30

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