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8
volunteer
I'm sorry.
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volunteer
Uh, but lines
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volunteer
The transversal
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volunteer
from congruent alternate interior angles.
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volunteer
but uh you can use this statement, of course.
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volunteer
I'm sorry.
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student
To say that um to say the angle, BAC is congruent to PCD.
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volunteer
Oh
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volunteer
uh, can you please repeat? I'm sorry.
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student
To say that CAD is congruent to ACD just like um we just proved.
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volunteer
Yes, yes.
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volunteer
Yeah, you can do that.
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student
Um
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volunteer
Um
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student
it says that it like
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student
it doesn't work because um they're either not alternate exterior angles or we haven't proven the applic applicable lines to be parallel.
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volunteer
Uh, no. Oh, these are, which option did you choose, the last or the second last one?
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student
Um, I just tried both, and that's what they say.
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volunteer
How is that possible? So it says parallel lines cut by a transversal form congruent alternate interior angles, this should be true because
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volunteer
um
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volunteer
because we know that line BC is parallel to AD because this is given and we also know that AC acts as a transversal hair. So
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volunteer
so your angle BCA should be congruent to CAD AD.
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volunteer
because of this property.
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volunteer
Um
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volunteer
are you sure
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student
Um, this is like also what I have so far, maybe like I'm missing something.
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student
And then like when I click try it like says that um
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student
it doesn't work for that proof.
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volunteer
Mm
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volunteer
Uh, can you share your screen if that's possible?
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student
Um, how
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volunteer
Mm.
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volunteer
Oh, OK. Um
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student
I said like a picture of my screen, like so far.
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student
um, on the website.
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student
below where we did the math.
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volunteer
OK
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volunteer
then you of other BCA
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volunteer
is I went to CAD PCA.
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volunteer
E C A C A D, OK.
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volunteer
Uh panel lines set by transversal um form alternated interior angles. This is correct, and AC is AC is congruent to AC.
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volunteer
uh reflexive property and then
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volunteer
angle BAC and ACD.
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volunteer
BAC
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volunteer
B A C N A C D OK.
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volunteer
Uh pal and cut patterns were still form concrete alternate interior angle.
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volunteer
Yeah, this is, this is what I'm telling you.
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volunteer
Uh, for your
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student
So far, like up until question number 3, it says that everything is right. Um, step number 3, and then when it comes to step number 4, it's, that's when it gets wrong.
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volunteer
Yeah, exactly. You, you can't say that this is like, I mean, over here, it's correct because say
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student
OK
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volunteer
uh this is a, this is, right? And you know that these signs are parallel, so this angle should be
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volunteer
just a second
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volunteer
This is your line.
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volunteer
We can say that this angle will be equal to this angle because we know that these two lines are parallel and this acts as a transversal, but how can you say that this angle will be equal to this angle. We don't know whether A, B, and CD are parallel or not.
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volunteer
So you can't use this seasoning over here. I mean, uh, the statement is correct, but the reasoning here is wrong.
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volunteer
So.
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volunteer
yeah.
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student
Mm
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volunteer
Mhm.
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student
um
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volunteer
Mm.
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student
I'm
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student
trying other possible reasonings, but
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student
um
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volunteer
Oh, what are the other questions?
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student
there's none of them seem to work.
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volunteer
Reflexive property won't work here.
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volunteer
Uh
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volunteer
that
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student
Um, well, technically reflexive property. I don't think reflexive property would work because it has to be the same exact angle.
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volunteer
Yeah, about to saying the same thing like it won't work.
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volunteer
All right, I'm
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student
Yeah, none of them work for that statement.
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volunteer
this help to work.
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volunteer
vertical angles are congruent, these are not vertical angles, in triangle angles opposite to confluent sides are congruent.
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volunteer
Um.
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volunteer
angles opposite to congruent sides.
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volunteer
So do we know that these are consument sides.
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volunteer
No, we don't know that, so.
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volunteer
this will also not work.
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volunteer
An angle bisector divides an angle into two congruent angles.
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volunteer
but we also don't know whether this is an angle bisector or not.
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volunteer
So that is also not a correct reasoning.
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volunteer
if I also eliminate this
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volunteer
and
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volunteer
this also won't work
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volunteer
uh exterior angles for exterior angles, what can we say?
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volunteer
Um, these are not exterior angles.
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volunteer
So this also won't work.
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volunteer
So the only two options we have is transitive
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volunteer
or substitution
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volunteer
No
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student
Um, when I used
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student
both of them, none of them work.
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volunteer
they don't, oh, they don't work. OK.
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volunteer
Uh, OK.
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student
No, maybe we have to do like a statement before we get to the statement.
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volunteer
Um, so you are saying that we should change the statement.
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student
yes
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