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19 Nov 2017, 23:47
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D
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Question Stats:
81% (00:36) correct
19%
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wrong
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Lines m and n intersect, as shown in the figure above. What is the value of u - w?
(1) u = 90
(2) Lines m and n are perpendicular.
Attachment:
1122.jpg [ 4.27 KiB | Viewed 6429 times ]
20 Nov 2017, 00:13
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(1) If u = 90 it follows that w = 90, so the u-w=0
(2) Again, here we can deduce that u=w=90, thus u-w=0
Answer D
(2) Again, here we can deduce that u=w=90, thus u-w=0
Answer D
20 Nov 2017, 04:35
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Bunuel
Lines m and n intersect, as shown in the figure above. What is the value of u - w?
(1) u = 90
(2) Lines m and n are perpendicular.
Attachment:
1122.jpg
u+w = 180
1) u = 90 so w =90
u-w = 0 Suff
2) perpendicular - at an angle of 90 u=w, u-w = 0 Suff
Don't know what happended to me... must have been tired. 
