Other triangle congruence postulates | Congruence | Geometry | Khan Academy

[@shenkie225]

i spent a good week not paying attention in geometry...and now im here...these videos are a blessing honestly.

[@voiceofpalestine2]

ikrrr

[@annie-wz2kh]

we in the same boat🤣🤣

[@AquaBlazeFake]

not only is the explanation very good, but let's just appreciate the fact it's in dark mode

[@youtubeaccount6676]

Amen

[@RodalAuto]

I wish I had a better teacher I wouldn’t be watching this but thanks

[@kao_rutaru]

Legit helped me in my math test. Thank you!

[@theoretically_true151]

0:00 SSS Proves congruence, valid postulate If all the sides between both triangles are congruent, then the triangles are congruent 0:26 Is AAA a valid postulate? Is not a valid postulate, but it implies similarity Angles can be the same in both triangles with different lengths on sides (same shape, but not the same size) 3:21 Is SAS a valid postulate? Proves congruence, valid postulate If two adjacent sides and an angle between those adjacent sides are congruent between both triangles, then the triangles are congruent 6:03 Is ASA a valid postulate? Proves congruence, valid postulate If two adjacent angles and a side between those adjacent angles are congruent between both triangles, then the triangles are congruent 8:46 Is AAS a valid postulate? Proves congruence, valid postulate If two adjacent angles and a side not between those adjacent angles are congruent between both triangles, then the triangles are congruent. 11:30 Is SSA a valid postulate? Is not a valid postulate, SSA does not necessarily imply congruence nor similarity Not mentioned: HL Proves congruence, valid postulate Given 2 right triangles where the hypotenuse and a leg of each triangle are congruent, then the (right) triangles are congruent. Summary: -SSS, SAS, ASA, AAS are valid triangle congruence postulates -SSA is not a valid postulate (the way I remember that this is not a valid postulate is when you spell out the acronym backward, it's not a very nice word) -AAA is not a valid postulate, although if asked to prove similarity, AAA comes into play

[@voiceofpalestine2]

thanks bro

[@voiceofpalestine2]

I have my term exams a few days later and I was so worried but this video saved my life. Thnx man.

[@josilync.2526]

I play this because my teacher won't teach me

[@HungryForWater]

I like chicken 23 exactly

[@Daninpe]

same

[@laurenceaquino923]

Me too

[@davidwas77]

same

[@ncryptic5127]

Man u saved my life i didn't understand this lesson at all an I was going to take an exam on so huge thx 🙃

[@irazbrazgaming797]

Thank you sir, you have helped me a lot today and for that thank you.

[@danksamosa3952]

Irazbraz Gaming you look bad

[@legendic2755]

Who is reading the comments while watching

[@inayasohail6328]

I am

[@abbigailarthur9334]

Me🥲

[@voiceofpalestine2]

meeee

[@SaishreeLovesRawring]

Ya

[@christianchristenson8095]

Online school sucks, this is the only reason why I pass. Thanks Kahn

[@Factologist104]

Best teacher ever (KEEP IT UP EXELENT CONTENT SIR)

[@jilltrimbath484]

Too long didn't read: SSS = congruent SAS = congruent ASA = congruent AAS = congruent SSA = not nessacarily congruent AAA = not congruent

[@kiaramartinez8911]

I don’t understand how AAS is congruent

[@gyandevreddy5293]

@@kiaramartinez8911 Dude if you know 2 angles you can find the thirds angle. and side is to make sure the triangles have same lengths and not only angles. Hope it helps.

[@gjd112902]

HL or hypotenuse-leg also works for congruency

[@worldpeace6692]

Thanks a lot This was helpful

[@pokenerd265]

thank you for this man i have a math teacher who’s really bad at his job 🙏

[@andrewgonzales7938]

Thank you !!!

[@la1na._.m00n]

Hii! Amazing video here! Nice hand techniques but I think you made a mistake where the tiny green triangles in the beginning of the video has 3 lines not 3 lines and 4 lines….

[@farisali9083]

play the video at 0.5 to hear a drunk guy

[@jamiep6872]

lmaoooooooooo

[@saketdhadge9419]

Faris Ali hahahaha

[@jasonrojas2961]

😂😂😂

[@Daninpe]

im trynna learn and u say this smh

[@PhantomRaptor1]

0.25x

[@Foltyn1-i4x]

Thank you khan

[@SaishreeLovesRawring]

I thought khan academy was like other classes but when i tried the app my mind was blown

[@bellaF]

thanks for the help math man

[@nawabsahib4843]

Thank you sir you helped me so muck🤗

[@muhamadbaklizi9206]

THANK YOU

[@cyunderwood8323]

my two triangles don't have any tics to show side congruence or any angle mark sss? or sas? please help thanks

[@ParamVaishya]

Thank you so much with the lesson I hope you keep posting amazing videos I love your content thanks

[@kavyakhatiwada6807]

I asked my sir, "sir can you please make me understand congruent angles becuz i didnt understand this,p" he said "that's why u need to listen to me in my class" the I found this vid, ;+

[@Vern01]

You also “need to make you understand” grammar

[@ParveenKumar-qf3qo]

sir I have proved SSA

[@yvonnegoldblatt621]

how is ASA and AAS different?

[@thecosmos7671]

In ASA we consider the side between 2 angles whereas AAS corresponds to any two angles being congruent and a side

[@yvonnegoldblatt621]

@@thecosmos7671 oh ty haha i figured it out by them but thanks lol

[@hqs9585]

Surprise on the little explanation of SSA: your drawing is simply false. Only true if you use the same sides but interchange the position, then you can form the two triangles that are not congruent or similar.

[@penelopepeach5002]

YES thank you!

[@jonossoff1391]

My Fellow Time Travelers! This is a comment posted by an odd 16 year old who is misinformed and has a D in geometry! Head this message, and pass it on, for any unfortunate soul that may stumble upon it in the near future!

[@voiceofpalestine2]

sure lol

[@technicalhelpmaroof5961]

thanks sir your explanation is good

[@karthikgattepalli2507]

Thxs

[@ChandanSharma-wo7vs]

Triangles are congruent by SSA criterion. The angle which you drew when you were explaining SSA criteria was not equal to the angle drawn in the other triangle. If you take variable lengths of the second side and draw the same angle as the first triangle on it, then there will be one case when both the triangles will be congruent.

[@ChandanSharma-wo7vs]

And what about Right angle - Hypotenuse - Side (RHS) criteria. You did not explain it.

[@ChandanSharma-wo7vs]

Well there is a another video for that. Thank you Khan Academy

[@OmarAATv]

couch Sanders FTW!!

[@ThomasGiles]

On SSA, didn't it just 'look' like it works? I think it might have been your drawing or something?

[@computerfiles495]

thanks dad

[@ishdx9374]

SAS

[@josilync.2526]

Thank you

[@vineesharma900]

If we take two equilateral triangle then AAA and sides will be same .

[@henrymariott2631]

so basically if there is ever a side it will always be congruent

[@Myles.Mc08]

RHS?

[@illumi2792]

me thinking they're all still triangles: oh... yeah... i get it now-

[@jeffdivinogamingytdevino148]

nc

[@hqs9585]

Or go from acute to obtuse (or vice-versa). I.e., is nor unique.

[@shachipandey8428]

P

[@randomburntchickennugget5238]

lol...

[@jansasha2628]

SSA is congruent

[@spiderjump]

Jan Fransmann no it is not.

[@martinsimonreyes2071]

I also think its congruent. There is only one angle that could hit the last point

[@markrayne5382]

@@spiderjump yes it is, as the angle increases so will the length of the line in order the reach the bottom line, likewise as the angle decreases the length of the line will become shorter, in either case this cannot happen as corresponding lines on both triangles must be congruent.

[@jansasha2628]

i tried many times but it did not work!

[@ericawu8779]

real estate lmaol

[@Idkwqsted]

I am the only one who watches these videos and still don't understand. Smh

[@azaadkzn9185]

My teacher cant teach lol

[@firasyazbeck5735]

Just watching because i have to do a project but i won't subscribe

[@SaishreeLovesRawring]

._.

[@eliotlee454]

Next time, don't mention similarity in a video meant for congruence. I ended up taking notes on this video and realized that this was on similarity which i already know. Khan Academy P.S. Congruency is not a word.

[@bdotpesos9316]

Idiot,it is a word,search it up

[@inayasohail6328]

Hi eliot

[@zack_120]

Two angles with the same AAA are called similar, a common word that everyone understand, then why two angles with the same SSS are called congruent, a word sounding weird and so uncommon that many people don't understand? This is one of the reasons many people don't like math or science because of such stink vocabulary.

[@subhashkini6815]

Thank you !!!!!

[@Grey_like_the_color]

THANK YOU