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Bunuel
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Bunuel

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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Bunuel

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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