6. Which of the following facts, if true, would allow you to prove that lines l and m are parallel? m

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6. Which of the following facts, if true, would allow you to prove that lines l and m are parallel?

m<2+m<4=180° m<1=m<8 m<6+m<3=180° m<7=m<6

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Another line intersects two parallel lines A and B as shown in the attached figure. Angles 2 and 3 are equal, because they are opposite angles, while angles 3 and 7 are also equal, because they are corresponding angles, therefore it is achieved that

angle 2 = angle 3

angle 3 = angle 7

So angle 2 = angle 7

So the fourth option is right.