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l1 and l2 are parallel
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01 Jun 2023, 06:00
01 Jun 2023, 06:00
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99% (00:18) correct
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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).
Re: l1 and l2 are parallel
[#permalink]
14 Jan 2026, 08:43
14 Jan 2026, 08:43
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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