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8
volunteer
Um
4,385
402
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volunteer
uh, can you just share what the, what type of reasonings do you have that, that list of reasonings?
4,385
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volunteer
I can tell you from that
4,385
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volunteer
OK
4,385
405
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volunteer
So these are not vertical angles.
4,385
406
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volunteer
So this one is wrong.
4,385
407
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volunteer
All right angles are congruent.
4,385
408
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volunteer
Yeah, maybe you can use this one.
4,385
409
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volunteer
because both of these are right angles, so they should be congruent.
4,385
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student
Its still not working
4,385
411
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volunteer
It's not working. Oh my God, this is strange.
4,385
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student
I tried that before
4,385
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volunteer
Um
4,385
414
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volunteer
uh, what else could be the issue?
4,385
415
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volunteer
Mm
4,385
416
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volunteer
We know that these are right angles because it's sort of given.
4,385
417
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volunteer
you know, what a substitution? Can you explain substitution to me?
4,385
418
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student
Like if we have a variable and we can substitute that for a number we may know
4,385
419
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student
90+x=180
4,385
420
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volunteer
Like we have a variable and we can substitute that for uh
4,385
421
[]
volunteer
value that we know. OK.
4,385
422
[]
volunteer
Um, OK
4,385
423
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volunteer
So I don't think this is substitution.
4,385
424
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volunteer
If I also eliminate this in a triangle angle opposite of congruent sides are.
4,385
425
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volunteer
congruent, we also would use this because we don't know whether these sides are congruent or not.
4,385
426
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volunteer
An angle bisector, there is no angle bisected here.
4,385
427
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volunteer
parallel lines cut by a transversal
4,385
428
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volunteer
Do we know that these lines are parallel?
4,385
429
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student
no
4,385
430
[]
volunteer
or congruit alternate interior, so, yeah, and also they're talking about alternative ear and there is no such rule of alternate interior angles here. So this also shouldn't be our answer. Parallel lines cut by or transversal form congruent alternate exterior angles
4,385
431
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volunteer
alternate exterior angles. We're not talking about them.
4,385
432
[]
volunteer
They shouldn't also be an answer, so ideally it should be
4,385
433
[]
volunteer
all right angles are congruent, but I don't know why is that not working?
4,385
434
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volunteer
Uh, maybe we can think of something else then.
4,385
435
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volunteer
So
4,385
436
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volunteer
hm
4,385
437
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volunteer
Uh, they have given us that BC is perpendicular to AD.
4,385
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volunteer
BC is
4,385
439
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volunteer
at least one of them to.
4,385
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student
It shows this when I right that
4,385
441
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volunteer
is not proven or is not proven a right angle.
4,385
442
[]
volunteer
Let's let's see that
4,385
443
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volunteer
So BC is perpendicular to AD
4,385
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volunteer
which means that angle BAD should be 90 degree and AD is perpendicular to CD, which means that this angle should also a 90 degree.
4,385
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volunteer
So
4,385
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volunteer
um
4,385
447
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volunteer
B A D
4,385
448
[]
volunteer
Uh, what do you think should be the problem here?
4,385
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volunteer
Because according to me it's, it's correct.
4,385
450
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volunteer
It should be correct
4,385
451
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volunteer
But it's not working, so.
4,385
452
[]
volunteer
um
4,385
453
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student
hmm
4,385
454
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volunteer
at least one of the two angels I mentioned is not proven right angle
4,385
455
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volunteer
How is it not a proven right angle. It's it's, it's given in the question.
4,385
456
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volunteer
OK
4,385
457
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volunteer
So what else can we do?
4,385
458
[]
volunteer
Uh, have you entered the other statements correctly?
4,385
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student
I did this so far
4,385
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volunteer
A convent to AD reflexive.
4,385
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volunteer
and
4,385
462
[]
volunteer
PAD OK.
4,385
463
[]
volunteer
APT is
4,385
464
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student
we just need one more angle
4,385
465
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volunteer
uh, everything seems correct to me. I don't know what the problem is.
4,385
466
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student
we have angle and side so far
4,385
467
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volunteer
B A D N A D C B A D N A D C.
4,385
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volunteer
We have other, oh, so you, you need a third statement?
4,385
469
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volunteer
So you can use uh this, this should be your, this also should be one of your statements, right?
4,385
470
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volunteer
We also have this here
4,385
471
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volunteer
So this is our angle, this is our side. This is angle. So by AAS, we are proving this
4,385
472
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student
can we use vertical angles y saying that BEC is congruent to AED
4,385
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volunteer
So we can use vertical angles
4,385
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volunteer
as saying that the ECH congruent.
4,385
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volunteer
BEC
4,385
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volunteer
to AED.
4,385
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student
It worked!
4,385
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volunteer
Uh, I'm sorry, I'm not able to understand what you did.
4,385
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student
I said that
4,385
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student
BEC is congruent to AED
4,385
481
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volunteer
BEC is congruent to AED.
4,385
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student
by saying they are vertical angles
4,385
483
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volunteer
BEC for going to AED right because they are, they are vertically opposite angles.
4,385
484
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volunteer
Yeah, correct
4,385
485
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volunteer
The vertical angles, right?
4,385
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volunteer
Yeah
4,385
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student
and we can say the same for BEA and CED
4,385
488
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volunteer
And we can say the same for BEA B E A
4,385
489
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volunteer
and CED C E D.
4,385
490
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volunteer
OK
4,385
491
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volunteer
These numbers are also equal because they are vertical albums.
4,385
492
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volunteer
But how will that help you to, to prove that trianger BAT is congruent to CDA.
4,385
493
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volunteer
Um
4,385
494
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student
Maybe something about like how they are both having something to do with E
4,385
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volunteer
so that these angles like.
4,385
496
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student
or another reflecive perhaps
4,385
497
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volunteer
OK, OK. I, I got the point now.
4,385
498
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volunteer
OK, so, so
4,385
499
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volunteer
um
4,385
500
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volunteer
if doesn't this angle are equal,
4,385
501
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