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Mathematics 18 Online
OpenStudy (anonymous):

Jazz draws a transversal, t, on two parallel lines AB and CD, as shown below. He makes the following table to prove that the alternate interior angles are equal.

OpenStudy (anonymous):

Uploading the rest.

OpenStudy (anonymous):

Statement Justification angle 2 = angle 6 Corresponding angles of parallel lines are congruent. angle 2 = angle 4 ? angle 4 = angle 6 transitive property of equality, angle 2 = angle 6, angle 2 = angle 4, therefore angle 4 = angle 6

OpenStudy (anonymous):

OpenStudy (anonymous):

Angles 1 and 3 are supplementary; therefore, angle 2 is equal to angle 4. Angles 1 and 3 are congruent; therefore, angle 2 is equal to angle 4. Angles 1 and 4 and angles 1 and 2 are supplementary; therefore, angle 2 is equal to angle 4. Angles 1 and 4 and angles 1 and 2 are congruent; therefore, angle 2 is equal to angle 4.

OpenStudy (campbell_st):

Angle 2 = Angle 4 as they are vertically opposite angles.... (sometimes called vertical angles) opposite sides of the vertex are congruent. Angle 4 = Angle 6 interior alternate angles in parallel lines are congruent. thats about the all there is...

OpenStudy (anonymous):

So the answer is? Don't mean to be hard but you kinda confused me.

OpenStudy (campbell_st):

well you have proven Angle 2 = angle 4 and angle 4 = angle 6 therefore angle 2 has to equal angle 6.

OpenStudy (anonymous):

Oh okay...but that's not a choice.

OpenStudy (anonymous):

2=4, 6=8,1=3,5=7 are all Opp. angle which are congruent also 4 = 6 BECAUSE of two parallel lines and a kind a Z formation hint look for z formations always in a transveral, it will give you lots of information

OpenStudy (anonymous):

Sorry but I'm still confused. I'm really sorry.

OpenStudy (anonymous):

kindly justify?

OpenStudy (anonymous):

I don't understand how to get the right answer.

OpenStudy (anonymous):

Or what to do.

OpenStudy (anonymous):

do you agree 2=4 and 4=6?

OpenStudy (anonymous):

Yes

OpenStudy (anonymous):

so can we say 2=6?

OpenStudy (anonymous):

Right

OpenStudy (anonymous):

and what kind of angles are 2 and 6 ?

OpenStudy (anonymous):

Congruent?

OpenStudy (anonymous):

exactly

OpenStudy (anonymous):

we proved that they are congruent now take a careful look start from left i.e. from point A, come down and move toward ray D , does that look like a Z

OpenStudy (anonymous):

your answers are almost with you

OpenStudy (anonymous):

Yes

OpenStudy (anonymous):

does that help?

OpenStudy (anonymous):

To be honest it lost me.

OpenStudy (anonymous):

Wait is it the second choice?

OpenStudy (anonymous):

read the reasoning above , and you have the basic information to solve the question,

OpenStudy (anonymous):

Wait is it the second choice?

OpenStudy (anonymous):

1 and 3, there for 2 and 4, is the closest match, 1 and 3 form a vertically oppo angle pair

OpenStudy (anonymous):

Thanks I would give you a medal but IDK how, I new.

OpenStudy (anonymous):

Do you have time to help me with another one?

OpenStudy (anonymous):

sure

OpenStudy (anonymous):

Okay

OpenStudy (anonymous):

@BIGDOG96 so what was the answer.........

OpenStudy (anonymous):

Was it Angles 1 and 3 are congruent; therefore, angle 2 is equal to angle 4?

OpenStudy (anonymous):

@psi9epsilon @BIGDOG96

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