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Streets L, M and N are straight and level, and they intersect to form
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Bunuel
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Streets L, M and N are straight and level, and they intersect to form [#permalink] New post  17 Aug 2017, 22:53
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Streets L, M and N are straight and level, and they intersect to form a triangle. If streets L and M intersect at a 40° angle and if street N is perpendicular to street M, at what acute angle do streets L and N intersect?

(A) 30°
(B) 35°
(C) 40°
(D) 45°
(E) 50°
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pushpitkc
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Re: Streets L, M and N are straight and level, and they intersect to form [#permalink] New post  17 Aug 2017, 23:18
Bunuel wrote:
Streets L, M and N are straight and level, and they intersect to form a triangle. If streets L and M intersect at a 40° angle and if street N is perpendicular to street M, at what acute angle do streets L and M intersect?

(A) 30°
(B) 35°
(C) 40°
(D) 45°
(E) 50°



Hi Bunuel,

There seems to be some problem in the question.
Either the angle is between L and N, or we have been asked to find the acute angle between the streets L and N
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Re: Streets L, M and N are straight and level, and they intersect to form [#permalink] New post  17 Aug 2017, 23:55
Bunuel wrote:
Streets L, M and N are straight and level, and they intersect to form a triangle. If streets L and M intersect at a 40° angle and if street N is perpendicular to street M, at what acute angle do streets L and M intersect?

(A) 30°
(B) 35°
(C) 40°
(D) 45°
(E) 50°


LMN is a right angled triangle with LM intersecting at 40, MN intersecting at 90 and LN intersecting at 50
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Re: Streets L, M and N are straight and level, and they intersect to form [#permalink] New post  18 Aug 2017, 00:19
The question is somewhat wrong as it as already given that L and M intersect at 40 degrees.

What is asked to find is not clear
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Bunuel
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Re: Streets L, M and N are straight and level, and they intersect to form [#permalink] New post  18 Aug 2017, 01:26
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sunchh wrote:
The question is somewhat wrong as it as already given that L and M intersect at 40 degrees.

What is asked to find is not clear

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Re: Streets L, M and N are straight and level, and they intersect to form [#permalink] New post  18 Aug 2017, 01:44
angle between two sides (Streets) L and M is 40 degree
the angle between the sides (Streets) N and M is 90 degrees
Hence angle between sides (Streets) L and N should be 180-(40+90)=50 degree (Option E)
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Re: Streets L, M and N are straight and level, and they intersect to form [#permalink] New post  19 Aug 2017, 20:49
Bunuel wrote:
Streets L, M and N are straight and level, and they intersect to form a triangle. If streets L and M intersect at a 40° angle and if street N is perpendicular to street M, at what acute angle do streets L and N intersect?

(A) 30°
(B) 35°
(C) 40°
(D) 45°
(E) 50°


\(\angle\) LM = 40
\(\angle\) NM = 90
\(\angle\) LN = 180 - (40+90)
= 50

Answer E
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Re: Streets L, M and N are straight and level, and they intersect to form [#permalink] New post  10 Nov 2018, 23:51
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