Which of the following is an example of perpendicular lines?

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Step-by-step explanation:

In geometry, a branch of mathematics, perpendicular lines are defined as two lines that meet or intersect each other at right angles (90°).

4 I'm so glad to help! :) :P

Step-by-step explanation:

first u put two fingers up then another two. u count it. and there u go the awnsers it four. or u can count. 1 2 3 4

1 2 1 2