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8
volunteer
Um, OK
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volunteer
Mm
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volunteer
So we have
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student
sorry my mice is glitching again
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volunteer
ASA, SSS.
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volunteer
SAS
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volunteer
Just, just give me a minute. Um, I am thinking about this
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student
I figured it out
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volunteer
OK. That's great
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student
The answer is AAS
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student
with the final proof
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volunteer
AAS Yeah, AES is another criteria which we can use.
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volunteer
So AAS because this angle this angle and this site
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volunteer
Yeah
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volunteer
we can use that
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student
So we can just say triangle ABC is congruent to Triangle
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volunteer
ABC is congruent to.
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student
CDA
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volunteer
It it may
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volunteer
you are saying it's coming to CDA.
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volunteer
A B C C D A
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volunteer
A B C C D A. Yeah. Yeah, yeah, correct.
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volunteer
Well done
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volunteer
Basically, we have 5
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student
Thank you!
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volunteer
uh congruency criteria.
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volunteer
Yeah, sure
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volunteer
Do uh do you want me to help you with any other question?
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student
Yes Please!
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volunteer
OK
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volunteer
Yeah
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volunteer
Uh, can I just clear the whiteboard or do you wanna
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volunteer
write something down
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student
we can clear is!
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volunteer
OK
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volunteer
Just uh share the next question and we can work on it together.
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volunteer
OK
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volunteer
So
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volunteer
uh, is the figure same, or, or, or the figure is not given, I guess.
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volunteer
That's good
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volunteer
OK
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volunteer
So given angle
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volunteer
A B D
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volunteer
is congruent to anger DCA.
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volunteer
BC is perpendicular to AD and.
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volunteer
AD is perpendicular to CD through triangle BAD is compliment to CDA and
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volunteer
and it's OK, given is over here.
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volunteer
OK
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volunteer
So the 5 criteria that we have
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volunteer
SSS
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volunteer
ASA
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volunteer
SAS
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volunteer
A A S
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volunteer
RHS
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volunteer
Triangle BAD.
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volunteer
Let, let me just highlight these triangles for you.
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student
For this one Im taking notes so it may take longer. Just a bit tho!
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volunteer
318
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volunteer
OK, no problem
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volunteer
B A D C D A.
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volunteer
So one thing which is uh very clear.
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volunteer
is that both of them have uh these 90 degree angles, right?
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student
Yes!
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volunteer
So we can very easily say that, uh, these, these angles will be congruent. So I can say that anger BAD.
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volunteer
is equal to angle
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volunteer
Ace ADC.
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volunteer
because both of them are 90 degree.
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volunteer
and this is sort of a given statement.
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volunteer
Uh, what else can we say?
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volunteer
We can say that this airline AD is common in both of those, so we can use that as a reflexive property. So
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volunteer
the equals
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volunteer
AD
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volunteer
reflexive property.
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volunteer
So now we have one angle and we have one side.
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volunteer
What else can we do
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volunteer
Mm
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volunteer
We also know that angle ABD, ABD this angle.
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volunteer
is equal to anger DCA this angle.
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volunteer
These angles are equal because it's given
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volunteer
angle
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volunteer
A B D equals angle A, C, D
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volunteer
because this is given
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volunteer
So now we have
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volunteer
two angles and one side, and the side, uh, this is the site that we are talking about. The site is not included. So by AAS.
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volunteer
we can say that our two triangles are congruent.
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volunteer
right
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volunteer
Is this clear
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student
Yes!
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volunteer
OK. So by AAS
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volunteer
uh, now let's try naming those triangles.
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volunteer
or, or it's the name is already given, we can just
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volunteer
uh write that from here. Triangle BAD.
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volunteer
tangle BAD is congruent to triangle
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volunteer
CDA
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volunteer
Yeah, basically, that's it
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volunteer
This is it. So, if you have any questions, then ask.
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student
For the first line you have
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student
whats a reasoning
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volunteer
For the 1st 9 year
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volunteer
Uh, what's the reasoning?
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