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24 Jul 2017, 23:19
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Difficulty:
65%
(hard)
Question Stats:
53% (02:05) correct
47%
(02:33)
wrong
based on 64
sessions
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In the diagram below, what is the measure of the non-reflex angle formed by extending the lines BD and CE? A reflex angle is one whose measure is greater than 180° but less than 360°
(1) x = y
(2) x + y = 40°
2017-07-25_1018.png [ 9.35 KiB | Viewed 3223 times ]
(1) x = y
(2) x + y = 40°
Attachment:
2017-07-25_1018.png [ 9.35 KiB | Viewed 3223 times ]
26 Jul 2017, 02:05
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Answer B:
First of all, by extending the two lines we will draw a concave quadrilateral. If we have the three angles, we can find the third angle.
Statement 1: We have two equal angles and the third angle we are trying to find but we don't know their values. So, this statement is insufficient.
Statement 2: We have all the required information to answer the question. x+y+60+z=360. 40+60+z=360 z=260 So the angle we are interested is 100 degrees.
First of all, by extending the two lines we will draw a concave quadrilateral. If we have the three angles, we can find the third angle.
Statement 1: We have two equal angles and the third angle we are trying to find but we don't know their values. So, this statement is insufficient.
Statement 2: We have all the required information to answer the question. x+y+60+z=360. 40+60+z=360 z=260 So the angle we are interested is 100 degrees.
29 Jul 2017, 01:33
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Answer is B
300-(x+y) is the final measure of the angle. So Statement 2 is sufficient
300-(x+y) is the final measure of the angle. So Statement 2 is sufficient
