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If l1 is parallel to l2, what is x + 2y?
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Bunuel
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If l1 is parallel to l2, what is x + 2y? [#permalink] New post  28 Oct 2014, 07:18
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Tough and Tricky questions: Coordinate Geometry.



Attachment:
2014-10-28_1914.png
2014-10-28_1914.png [ 18.23 KiB | Viewed 9196 times ]
If l1 is parallel to l2, what is x + 2y?

A. 90
B. 120
C. 180
D. 270
E. 360
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Re: If l1 is parallel to l2, what is x + 2y? [#permalink] New post  28 Oct 2014, 07:48
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Interior angle of l1 and l2 is same and equal to 2x.

Also 2x+4y = 180 which implies x+2y =90.

Hope this is correct.. +1 Kudos if correct
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Re: If l1 is parallel to l2, what is x + 2y? [#permalink] New post  29 Oct 2014, 00:04
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Answer = A = 90

Attachment:
2014-10-28_1914.png
2014-10-28_1914.png [ 18.56 KiB | Viewed 9053 times ]

Alternate angles are same; so 4y + 2x = 180

x + 2y = 90
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Re: If l1 is parallel to l2, what is x + 2y? [#permalink] New post  29 May 2016, 06:22
Bunuel wrote:

Tough and Tricky questions: Coordinate Geometry.



Attachment:
2014-10-28_1914.png
If l1 is parallel to l2, what is x + 2y?

A. 90
B. 120
C. 180
D. 270
E. 360


The shown angles are such that they are supplementary. (Vertically opposite angle of 2x will also have a value of 2x. That angle + 4y = 180). Or Corresponding angle of 4y will make a supplementary pair with 2x)

2x+4y = 180

x+2y =90

Option A is the answer.
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Re: If l1 is parallel to l2, what is x + 2y? [#permalink] New post  31 Mar 2020, 09:49
Bunuel wrote:

Tough and Tricky questions: Coordinate Geometry.



Attachment:
2014-10-28_1914.png
If l1 is parallel to l2, what is x + 2y?

A. 90
B. 120
C. 180
D. 270
E. 360


2x + 4y = 180
x + 2y = 90

IMO A
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Re: If l1 is parallel to l2, what is x + 2y? [#permalink]
31 Mar 2020, 09:49
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