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Are l1 and l2 parallel?

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Source: — Data Sufficiency |

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by Jay@ManhattanReview » Wed Sep 20, 2017 10:51 pm
ardz24 wrote:Are l1 and l2 parallel?

(1) l1 intersects l3 at a 45° angle.
(2) l3 intersects l2 at a 45° angle.

What's the best way to determine whether statement 1 is sufficient?
Statement 1: L1 intersects L3 at a 45° angle.

It does not provide any information about L2. Insufficient.

Statement 2: L3 intersects L2 at a 45° angle.

Does not provide any information about L1. Insufficient.

Statement 1 & 2:

Refer to the image; L1 and L2 can be either perpendicular or parallel.

Image

No unique answer.

The correct answer: E

Hope this helps!

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