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In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 07:00
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In the diagram above, triangle WXY intersects rectangle JKLM at points D, E, Q, R, S, and T. If line WX is parallel to line JK, what is the measure of angle WYX? (1) The sum of the measures of angles DQS and ERT is 260. (2) The sum of the measures of angles WQD and ERX is 100. Attachment:
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In the diagram above, triangle WXY intersects rectangle JKLM at points
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Updated on: 23 Jul 2019, 00:10
The data that can be deduced from the given figure: Angle EDQ = Angle RED = 90 degrees. > (a) DQYRE is a polygon with five sides. So, sum of internal angles of the polygon = 180 (5 – 2) = 540 > (b)
(1) The sum of the measures of angles DQS and ERT is 260. From (b) we have Angle DQS + Angle QYR + Angle YRE + Angle RED + Angle EDQ = 540 >(f)
From (a) we have 260 + Angle QYR + Angle RED + Angle EDQ = 540 260 + Angle QYR + 90 + 90 = 540 Angle QYR = 100
From the given figure, we can see that Angle QYR = Angle WYX Hence, Angle WYX = 100 degrees
Sufficient
(2) The sum of the measures of angles WQD and ERX is 100. If Angle WQD = a, Then Angle DQS = 180 – a > (c)
If Angle ERX = b, Then Angle YRE = 180 – b > (d)
From (c) and (d) we have Angle DQS + Angle YRE = 180 – a + 180 – b 360 – (a + b) 360 – 100 Angle DQS + Angle YRE = 260 > (e)
From (a), (b), (e) and (f) we have: Angle DQS + Angle QYR + Angle YRE + Angle RED + Angle EDQ = 540 260 + Angle QYR + 90 + 90 = 540 Angle QYR = 100
From the given figure, we can see that Angle QYR = Angle WYX Hence, Angle WYX = 100 degrees
Sufficient
Answer D
Originally posted by Sayon on 22 Jul 2019, 07:23.
Last edited by Sayon on 23 Jul 2019, 00:10, edited 2 times in total.



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In the diagram above, triangle WXY intersects rectangle JKLM at points
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Updated on: 22 Jul 2019, 07:30
In the diagram above, triangle WXY intersects rectangle JKLM at points D, E, Q, R, S, and T. If line WX is parallel to line JK, what is the measure of angle WYX? (1) The sum of the measures of angles DQS and ERT is 260. (2) The sum of the measures of angles WQD and ERX is 100. Please see solution in the attached file IMO D
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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 07:29
https://gmatclub.com/forum/download/fil ... c11c353308Clearly A is sufficient. IF a is sufficient B is also sufficient as B is a subset of A
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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 07:32
In the diagram above, triangle WXY intersects rectangle JKLM at points D, E, Q, R, S, and T. If line WX is parallel to line JK, what is the measure of angle WYX?
This is a medium level difficulty problem. It tests your ability to infer.
Let's get to the statements.
(1) The sum of the measures of angles DQS and ERT is 260. This statement is insufficient, as multiple possible values are possible for the break up 260.
(2) The sum of the measures of angles WQD and ERX is 100. This again is insufficient as multiple possible values are possible for break up of 100.
Combining the two we know that 100 will be broken up in 60, 40. Combing it all the perpendicular angles of 90 we can infer the other triangles and get the value of Y.
IMO C.



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In the diagram above, triangle WXY intersects rectangle JKLM at points
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Updated on: 22 Jul 2019, 19:08
From (1) The sum of the measures of angles DQS and ERT is 260 we have that:
DQS =x ERT = y
So, LQS= 180  x, and LSQ= x90 and then since LSQ and YST are opposite angles, they are equal.
Also, TRM = 180 y, and MRT= y90 and then since MRT and STY are opposite angles, they are equal.
Finally, since all angles of triangle SYT must sum 180, we have that:
x90+ y90 + WYX = 180
WYX = 360  x  y
WYX = 360  (x+y)= 100, so sufficient.
From (2) The sum of the measures of angles WQD and ERX is 100, we have that:
In this one you have the complementary angles of solution in (1), and each complementary angle is 180  x and 180 y, and if you sum up you arrive to the same formula in (1) 360  x y = 100, this one is also sufficient.
(D) is our answer.
Originally posted by Mizar18 on 22 Jul 2019, 07:45.
Last edited by Mizar18 on 22 Jul 2019, 19:08, edited 1 time in total.



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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 08:00
In the diagram above, triangle WXY intersects rectangle JKLM at points D, E, Q, R, S, and T. If line WX is parallel to line JK, what is the measure of angle WYX?
In order to solve this question, you need to see 2 things: 1. DQYER  pentagon, => TotalSUMofvertex = 180*(52) = 540 2. We know measures of vertex D and E = 90
In order to know vertex Y, we need to know the measures of vertex Q and R or their sum.
(1) The sum of the measures of angles DQS and ERT is 260. Q+R = 260 SUFFICIENT (2) The sum of the measures of angles WQD and ERX is 100. if WQD + ERX = 100: DQS + WQD = 180 ERT+ERX = 180 ERT+ERX + DQS + WQD = 360 ERT + DQS +100 = 360 ERT + DQS = 260
SUFFICIENT
ANSWER D



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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 08:10
JDEK forms a rectangle ad the lines are parallel. So JDE=KDE=90" SUBSEQUENTLY WDQ=REX=90" St. 1 DQS+ERT= 260" DQW+DQS= 180" and ERX+ERT=180" Add the equations, we get DQW+ERX= 100 Taking both triangles, we should get sum of 360" from 6 angles We have found two angles and sum of two angles, Adding up we get DQW+WDQ+DWQ+ERX+EXR+REX= 360 Insert the values, DWQ+EXR= 80 Taking the triangle WXY, we get 80+WYX= 180 So, angle Y=100  Suff St 2 provides the second step were we calculated sum of angles as 100. Hence, suff ANS D



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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 08:23
We require the Sum of angles W and X to arrive at the angle of Y as YXW is a triangle whose sum of angles must be equal to 180 degrees Angle J and K are 90 degrees (Rectangle). Since WK is parallel using traversal lines property  Angle WDQ and REX  90
i) Sufficient, Can derive Sum of DQW and ERX as 100 degrees. (Sum of Angles in a straight line at Q and R = 360 and Sum of DQS and ERT is 260. Which means that sum of angles at SQL and MRT is 100 and being vertically opposite angles DQW and ERX also has 100). So Sum of all angles in two triangles WQD and RXE other than Sum of angles W and X is 90*2+100. So W+X=360280=80 and So Y = 100
IMO D ii) Sufficient, Directly given the first inference of (i) that is Sum of DQW and ERX as 100 degrees.



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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 08:29
from statement (1), angle (1) + (2) = 260, as (1) a complement of (3), and (2) a complement of (4), then angle (3) + (4) = 360  260 = 100Triangles WDQ and XER are right angled triangles at D and E respectively, so (3) + (5) = 90, and (4) + (6) = 90 (5) + (6) = 90  (3) + 90  (4) = 180  100 = 80 so angle (7) = 180  [(5) + (6)] = 18  80 = 100 > sufficient from statement (2), angle (3) + (4) = 100 > which is typically the same conclusion of statement (1), so Also sufficientD
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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 09:09
Quote: In the diagram above, triangle WXY intersects rectangle JKLM at points D, E, Q, R, S, and T. If line WX is parallel to line JK, what is the measure of angle WYX? This is the Data Sufficiency (DS) question where were are asked to learn the measure of an angle WYX. Let us analyze the data from each statement first and try to identify if the given data is enough: Statement 1: (1) The sum of the measures of angles DQS and ERT is 260. Let us divide the solution in several steps: a) We know that angles DQS and ERT are 260 degrees. Angle DQS is external angle for the angle WQD. Angle ERT is external angle to ERX. We know that \(internal angle = 180 degrees  external angle\) In this case, angles \(WQD + ERX = (180  DQS) + (180  ERT) = 360  DQS  ERT = 360  (DQS + ERT)\) As \(DQS + ERT = 260 degrees\), => \(WQD + ERX = 360  260 = 100 degrees\) b) Also, one may note that angles WQD and SQL are vertical and vertical angles are equal. The same applies to the angles ERX and TRM. In this case \(WQD + ERX = SQL + TRM = 100\) c) Now, as triangles SQL and TRM are right triangles, we have 2 angles QLS and RMT each of 90 degrees. In this case, sum of angles QSL and RTM are equal to \((180  90  SQL) + (180  90  TRM) = 90  SQL + 90  TRM = 180  (SQL +TRM) = 180  100 = 80\) d) Angles QSL and YST are vertical and because of it they are equal. The same applies to angles RTM and STY. Thus, \(QSL + RTM = YST + STY = 80\). e) Since all angles of a triangle are equal to 180 degrees, angle \(SYT = 180  80 = 100\) We found an angle SYT what was required by the task. Please note that calculations in Data Sufficiency questions are sometimes unnecessary waste of time, and it is required to understand the concept without solving the task itself. Sufficient. Statement 2:(2) The sum of the measures of angles WQD and ERX is 100. This is what we found at the end of step a during analysis of 1st statement. Thus statement 2 is enough. Sufficient. Both statements are sufficient. Answer: D



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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 16:15
In the diagram above, triangle WXY intersects rectangle JKLM at points D, E, Q, R, S, and T. If line WX is parallel to line JK, what is the measure of angle WYX?
(1) The sum of the measures of angles DQS and ERT is 260. (2) The sum of the measures of angles WQD and ERX is 100.
∠KJL=∠XDL=∠WDQ =90 ∠JKM= ∠WEM=∠XER=90
Also, ∠XWY+∠WYX+∠WXY=180
∠WYX=180(∠WXY+∠XWY)
Hence if we know the value of (∠WXY+∠XWY), we can easily find ∠WYX.
Statement 1 The sum of the measures of angles DQS and ERT is 260. Hence DQW+ERX=360260=100 (∠WXY+∠XWY)= 180100=80
Sufficient
Statement 2 The sum of the measures of angles WQD and ERX is 100. (∠WXY+∠XWY)= 180100=80
Sufficient
IMO D



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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 18:31
Since JK is parallel to WX, then QDW and REX must be 90 degrees. Since angles in a triangle must add up to 180, we only need DWQ and EXR to solve for WYX. We don't even need to know the individual angles, just the collective sum of DWQ and EXR. 1.The sum of the measures of angles DQS and ERT is 260. You can figure out DQW and ERX with this since both ERT and DQS are on a straight line. Together, they must equal 360  260 =100 (each straight line must equal 180, since there are two, add together to be 360 and then subtract 260 for the sum of the angles). Since you know DQW and XRE equals 100 and you know WDQ and XER are right angles (90 each), you know that DWQ and EXR must equal 360280 = 80 (since you're calculating two triangles, the sum must be 180+180 =360 and 280 comes from 90+90+100 from above). If those two angles equal 80, then WYX must be 100 so that triangle WXY equals 180.Sufficient2.The sum of the measures of angles WQD and ERX is 100. This gives the same information as above but one less stepSufficientD



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In the diagram above, triangle WXY intersects rectangle JKLM at points
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22 Jul 2019, 18:37
Question: \(\angle{WYX}\) ? I believe my word explanation is sufficiently clear to understand, but anyway you can find attached sketch for clarity. Line \(WX\) is \(parallel\) to line \(JK\) > Line \(WX\) is \(perpendicular\) to both lines \(JL\) and \(KM\). Statement (1): \(\angle{DQS} + \angle{ERT} = 260.\) Draw line \(YZ\) that intersects line \(JK\) at point \(Z\) and is \(perpendicular\) to line \(JK\) > Line \(YZ\) is \(parallel\) to both lines \(JL\) and \(KM\).  \(YZ\) is \(parallel\) to \(JL\), \(then\) \(\angle{DQS} + \angle{SYZ} = 180\) > \(\angle{SYZ} = 180  \angle{DQS}\)  \(YZ\) is \(parallel\) to \(KM\), \(then\) \(\angle{ERT} + \angle{TYZ} = 180\) > \(\angle{TYZ} = 180  \angle{ERT}\). \(\angle{WYX} = \angle{SYZ} + \angle{TYZ}\) > \(\angle{WYX} = (180  \angle{DQS}) + (180  \angle{ERT})\) > \(\angle{WYX} = 360  (\angle{DQS} + \angle{ERT}) = 360  260 = 100\) Statement (1) is SUFFICIENT Statement (2): \(\angle{WQD} + \angle{ERX}\) = 100. Draw line \(YZ\) that intersects with line \(JK\) at point \(Z\) and is \(perpendicular\) to line \(JK\) > Line \(YZ\) is \(parallel\) to both lines \(JL\) and \(KM\).  \(YZ\) is \(parallel\) to \(JL\), \(then\) \(\angle{WQD} = \angle{SYZ}.\)  \(YZ\) is \(parallel\) to \(KM\), \(then\) \(\angle{ERX} = \angle{TYZ}.\) \(\angle{WYX} = \angle{SYZ} + \angle{TYZ}\) > \(\angle{WYX} = \angle{WQD} + \angle{ERX}\) > \(\angle{WYX} = 100\) Statement (2) is SUFFICIENT ANSWER IS (D)  Each statement alone is sufficient
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In the diagram above, triangle WXY intersects rectangle JKLM at points
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Updated on: 22 Jul 2019, 23:39
Please refer to the diagram below
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Originally posted by mira93 on 22 Jul 2019, 23:37.
Last edited by mira93 on 22 Jul 2019, 23:39, edited 1 time in total.



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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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23 Jul 2019, 04:23
Solution: Question stem analysis:From the given figure, we can determine that angle J, K , L , M are all 90 degrees since JKLM is a rectangle. We know that segment Jk is parallel to segment WX, and we know that segment Jl is a transversal .By the property of transversal lines, we know that line one is parallel to line two, and both lines are cut by the transversal, t. A transversal is simply a line that passes through two or more lines at different points. Some important relationships result. • Vertical angles are equal • Corresponding angles are equal: • Supplementary angles sum to 180° • Any acute angle + any obtuse angle will sum to 180°. Therefore angle Angle QDE & angle RDE both are 90 degrees each Statement One analysis:The sum of the measures of angles DQS and ERT is 260. We can observe that QDERY is a pentagon. since seg QD,DE,ER,RY &QY form 5 sides a pentagon is any fivesided polygon or 5gon. The sum of the internal angles in a simple pentagon is 540° We determined that angle QDE & angle RED both are 90 degrees each. & from statement one, we know that angle The sum of the measures of angles DQS and ERT is 260. Therefore angle DQS + ERT + QDE + RED + RYQ = 540 260 + 180 + RYQ = 540 Hence angle RYQ = 100 degree Statement one alone is sufficient we can eliminate C & E Statement two analysis:Let us consider two triangles QWD & triangle EXR , From question stem we know that QDE & angle RDE both are 90 degrees each, therefore angle WDQ & angle XER are 90 degrees each From statement two, we know that The sum of the measures of angles WQD and ERX is 100. If we sum up the two triangles QWD + triangle EXR we get the total sum as 360. Therefore from question stem and statement two, Angle WQD+ angle ERX + angle + angle WDQ + angle REX + angle QWD + angle RXE = 360 100+ 180 + angle QWD + angle RXE = 360 There fore angle QWD + angle RXE = 80 ....(1) Since the above are the vertices of the triangle, and sum of all the measures of a triangle is 180, and from (1) we can determine that Angle WYX = 100 degrees Hence both the statements are sufficient Answer must be D
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Re: In the diagram above, triangle WXY intersects rectangle JKLM at points
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23 Jul 2019, 04:37
(1) The sum of the measures of angles DQS and ERT is 260.
As shown in the attached picture, we need one of the angles of the highlighted pentagon. We can find it with 180(n2) formula. Sufficient. (2) The sum of the measures of angles WQD and ERX is 100.
This statement again gives the same data as the first one gives. Sufficient. Ans should be (D)
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