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l1 and l2 are parallel
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01 Jun 2023, 06:00
01 Jun 2023, 06:00
Expert Reply
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Question Stats:
100% (00:18) correct
0% (00:00) wrong based on 9 sessions
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Quantity A |
Quantity B |
a+b |
180 |
A Quantity A is greater.
B Quantity B is greater.
C The two quantities are equal.
D The relationship cannot be determined from the information given.
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Re: l1 and l2 are parallel
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03 Jun 2023, 04:00
03 Jun 2023, 04:00
Expert Reply
OE
You can’t assume that they are parallel just because they look like they are.
Only two angles are formed when two parallel lines are intersected by a third line: a big angle (greater than 90 degrees) and a small one (smaller than 90 degrees). Therefore, the angle directly across l1
from angle a is the same as angle b. These now form a straight line, so a + b = 180, and the correct answer is (C).
You can’t assume that they are parallel just because they look like they are.
Only two angles are formed when two parallel lines are intersected by a third line: a big angle (greater than 90 degrees) and a small one (smaller than 90 degrees). Therefore, the angle directly across l1
from angle a is the same as angle b. These now form a straight line, so a + b = 180, and the correct answer is (C).
gmatclubot
Re: l1 and l2 are parallel [#permalink]
03 Jun 2023, 04:00
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