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Mathematics 27 Online
OpenStudy (anonymous):

The figure below shows a transversal t which intersects the parallel lines PQ and RS. Write a paragraph to prove that the measure of angle 4 is equal to the measure of angle 8.

OpenStudy (anonymous):

OpenStudy (uh60blackhawk):

oh i hate prove

OpenStudy (anonymous):

Me too. I suck at them

OpenStudy (uh60blackhawk):

ill try help not sure i am going get it right

OpenStudy (uh60blackhawk):

well first of 4 and 6 is a transversal

OpenStudy (uh60blackhawk):

sorry trying to help two people

OpenStudy (uh60blackhawk):

So ange 4 and ange 6 is a transverse so that mean angle 4 and 2 are congruent

OpenStudy (anonymous):

That's fine. Take your time

OpenStudy (uh60blackhawk):

and angle 6 and 8 are congruent too.

OpenStudy (uh60blackhawk):

so this proves that 4 and 8 are congruent too.

OpenStudy (uh60blackhawk):

And i think that will be it but it

OpenStudy (uh60blackhawk):

@Compassionate am i correct on this prove?

OpenStudy (uh60blackhawk):

Oh i forgot to add the 4 and 6 is transverse that mean that line PQ and RS are parallel

OpenStudy (uh60blackhawk):

do you understand if not i can rewrite the prove.

OpenStudy (anonymous):

So the proof in paragraph form would be Angles 4 and angles 6 is a transversal. Since angle 4 and angle 6 are transverse, that means that line PQ and RS are parallel. This means that angles 4 and 2 and angles 6 and 8 are congruent. This proves that angle 4 and angle 8 are congruent.??

OpenStudy (uh60blackhawk):

yes that will be correct but make sure that i am right. little rusty on my proves

OpenStudy (anonymous):

@charlotte123 @wolfe8 would that be right?

OpenStudy (shamil98):

Nope.. 4 and 6 are on lines that are parallel...

OpenStudy (anonymous):

So should I take that part out completely?

OpenStudy (shamil98):

This means that angles 4 and 2 and angles 6 and 8 are congruent. eh this also incorrect. those angles are congruent because of the vertical angle theorem.

OpenStudy (uh60blackhawk):

but i thought angle 4 and 6 can prove it is a transversal

OpenStudy (uh60blackhawk):

when you proof that 4 and 6 a traversal you can prove that line pq an rs are parallel

OpenStudy (shamil98):

4 and 8 are congruent using the transitive property. <4 = <6 <6 = <8 <4 = < 8

OpenStudy (shamil98):

<4 = <6 ( alternate interior angles ) <6 = <8 ( vertical angle theorem ) <4 = <8 ( transitive property)

OpenStudy (uh60blackhawk):

yea i shamil98 is correct.

OpenStudy (anonymous):

Angle 4 is congruent to angle 6 because they are alternate interior angles. Angle 6 is congruent to angle 8 by the vertical angle theorem. Angle 4 is congruent to angle 8 by the transitive property.

OpenStudy (anonymous):

So would that be correct?

OpenStudy (uh60blackhawk):

yes

OpenStudy (uh60blackhawk):

this picture i am going attach going help you through parallelgram

OpenStudy (anonymous):

Thank you so much!

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