Proving Triangles are Congruent - MathHelp.com - Math Help

For a complete lesson on proving triangles are congruent, go to www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn the following postulates related to congruent triangles and triangle proofs. If the three sides of one triangle are congruent to the three sides of another triangle, then the triangles are congruent (Side-Side-Side or SSS). If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent (Side-Angle-Side or SAS). If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent (Angle-Side-Angle or ASA). Students are then asked to determine whether given triangles are congruent, and name the postulate that is used.

Пікірлер: 348

  • @abdulkhaliq465
    @abdulkhaliq4658 жыл бұрын

    I understood this so easily, why tf don't i understand when my teacher teaches me for more than an hour, thanks Internet haha

  • @devanshuchoudhary2915

    @devanshuchoudhary2915

    7 жыл бұрын

    Abdul Khaliq i agree

  • @slump6982

    @slump6982

    6 жыл бұрын

    My teacher is a bitch ... 😝

  • @lilnewtz2193

    @lilnewtz2193

    6 жыл бұрын

    I my teacher gave me homework without explaing it fuck her

  • @aluminiumbird5113

    @aluminiumbird5113

    5 жыл бұрын

    Luis Hernandez same

  • @strawhatshey3667

    @strawhatshey3667

    5 жыл бұрын

    I'M SAYING😂

  • @mikkyd9989
    @mikkyd99899 жыл бұрын

    wait as she stares into your soul at the end

  • @KobeWest

    @KobeWest

    8 жыл бұрын

    +Mikky:D AND IN THE BEGINNING

  • @unclecondog9807

    @unclecondog9807

    4 жыл бұрын

    lmao

  • @kookietales4671

    @kookietales4671

    3 жыл бұрын

    True 😂😂😂

  • @Kat-jm2eu

    @Kat-jm2eu

    3 жыл бұрын

    Omg lol

  • @syphfn3479

    @syphfn3479

    3 жыл бұрын

    legend has it i should get my soul back by 2021

  • @nathandog6420
    @nathandog64206 жыл бұрын

    legend has it that if you stair long enough at her eyes you'll understand the math

  • @jarrodjordan6782
    @jarrodjordan67828 жыл бұрын

    her hand righting was on fleek lmao

  • @gio4719
    @gio47193 жыл бұрын

    i was 2 when this came out, 13 years later im here.

  • @marthagrace6944

    @marthagrace6944

    3 жыл бұрын

    Same here

  • @bipulgamer07

    @bipulgamer07

    3 жыл бұрын

    @@marthagrace6944 me too 😁😁 My DOB is 26 October 2005.

  • @anilkumarpr3639

    @anilkumarpr3639

    3 жыл бұрын

    I was 4 lol

  • @chaihleeb220

    @chaihleeb220

    3 жыл бұрын

    @@bipulgamer07 im july 6 2006 :)

  • @pearrot3889

    @pearrot3889

    3 жыл бұрын

    Same XD

  • @Xxlilsybunny
    @Xxlilsybunny10 жыл бұрын

    I remember that if there is ASS in the figure then it cannot be congruent.

  • @fikayoomole8808

    @fikayoomole8808

    Жыл бұрын

    😂😂

  • @ashdos7205
    @ashdos72053 жыл бұрын

    The handwriting on the board is painfully perfect ***

  • @cutieepiee1799
    @cutieepiee179912 жыл бұрын

    Her students must have loved her.

  • @mihighscore
    @mihighscore6 жыл бұрын

    I appreciate your neat handwriting and symmetrical looking angles unlike any teacher I’ve had lol

  • @ryanchen5228
    @ryanchen52287 жыл бұрын

    if math wants people to like it then make it more entiryaning or more fun so people can enjoy while learing

  • @abalanbaby139

    @abalanbaby139

    6 жыл бұрын

    entertaining** but i agree

  • @kookietales4671

    @kookietales4671

    3 жыл бұрын

    True😭😭😭 she's teaching like a robot

  • @benzfm2866

    @benzfm2866

    3 жыл бұрын

    You're right. I'm so bad at Math, I don't know if it's because I'm just really that dumb or if it's the teacher.

  • @darrienanderson9986
    @darrienanderson99863 жыл бұрын

    She rocks the way teachers explain it can be difficult at times but thank God for youtube education lol

  • @rachelteariki6999
    @rachelteariki69995 жыл бұрын

    Thanks lady for the well explained examples of these angles and references. wish you were my maths teacher when I was at School. again, much'ly appreciated it.

  • @anonymousotter6455
    @anonymousotter64556 жыл бұрын

    I'm so glad the Internet exists so that I can search this up.

  • @wasabionmycereal5119
    @wasabionmycereal51196 жыл бұрын

    thanks robot girl :)

  • @kookietales4671

    @kookietales4671

    3 жыл бұрын

    LOL

  • @brandonhill111
    @brandonhill11110 жыл бұрын

    i think this video could of been done a little bit more right to the point

  • @KidSwaggaBeatz
    @KidSwaggaBeatz11 жыл бұрын

    im about to get a 100% on this final tomorrow, after all of your videos i watched

  • @abhi6054

    @abhi6054

    3 жыл бұрын

    i have my midterm tmrw LMAOO

  • @b3neaththestarlight299
    @b3neaththestarlight2999 жыл бұрын

    Simple but clear enough

  • @pokesimlvr
    @pokesimlvr13 жыл бұрын

    her smile creeps me out but i actually learned from her. youtube teaches me better than actual school. T_T

  • @kookietales4671

    @kookietales4671

    3 жыл бұрын

    Her smile comes in my dreams 😭 but yeah I can understand

  • @bratzillla
    @bratzillla8 жыл бұрын

    Omg tysmmmm you rock this video made my day YES hopefully my stupid brain will remember this!

  • @vandanapatil8275
    @vandanapatil82756 жыл бұрын

    U published this video on my birthday 24 october☺️

  • @dmjaxun9848

    @dmjaxun9848

    5 жыл бұрын

    Vandana Patil why the fuck does that matter other than to gain attention

  • @_kenziii

    @_kenziii

    4 жыл бұрын

    my birthday is also on October 24th ☺️

  • @Voltage.Bone.R
    @Voltage.Bone.R6 жыл бұрын

    SSS,SAS,ASA,and AAS where is ASS?

  • @veberlymercado3583

    @veberlymercado3583

    4 жыл бұрын

    In ur back KANEKI-SAN

  • @bionic12341

    @bionic12341

    3 жыл бұрын

    @@veberlymercado3583 lmao

  • @maggerss6457
    @maggerss64572 жыл бұрын

    finally! I felt very overwhelemed studying this lesson and you made it easier to understand. Thanks a lot

  • @squishymelonshd2879
    @squishymelonshd28796 жыл бұрын

    Definitely gonna use this as a musician

  • @Superstitious33
    @Superstitious339 жыл бұрын

    thank you so much! I was so lost in geometry today and this made it so clear!

  • @kingderrick8361

    @kingderrick8361

    10 ай бұрын

    How's life now. I bet you're more confused than ever lol

  • @11234Kevin
    @11234Kevin11 жыл бұрын

    Thank you so much :D I've learned alot from you!

  • @Fz.l_0
    @Fz.l_02 жыл бұрын

    after 4 days is 2022 and this still helped me thank u hahaha

  • @syediqbal8197
    @syediqbal81979 жыл бұрын

    so good lessons thanks a lot

  • @Jetxx
    @Jetxx7 жыл бұрын

    This video has saved thousands of lives, now it has saved yours.

  • @draconis2563

    @draconis2563

    7 жыл бұрын

    MingLee

  • @Jetxx

    @Jetxx

    7 жыл бұрын

    Draconis256 Kappa

  • @devanshuchoudhary2915

    @devanshuchoudhary2915

    7 жыл бұрын

    Jetx_x anything

  • @RandomlyRandomErick
    @RandomlyRandomErick12 жыл бұрын

    i should show this to my teacher and be like why can't you be like this so simple and easy to understand.

  • @owogamingguy
    @owogamingguy3 жыл бұрын

    She is a legend

  • @Jenheart15
    @Jenheart1513 жыл бұрын

    This video and lesson is going to help me so much with my future life. I love proofs so much.

  • @KennysLyfe
    @KennysLyfe11 жыл бұрын

    yes i might pass mah quiz tomorow !!!

  • @denisesanchez105

    @denisesanchez105

    3 жыл бұрын

    Did you pass?

  • @msw.960
    @msw.9607 жыл бұрын

    Amazing vid thank you so much 👍🏼

  • @NZmount
    @NZmount12 жыл бұрын

    i already understand this i just love her teaching so much so i watched it again

  • @just_ise4418
    @just_ise44184 жыл бұрын

    Nice handwritting btw, it made me learn much more better. Your explanation is also by far awesome

  • @pammimadhubabu700
    @pammimadhubabu7007 жыл бұрын

    understood very well

  • @youmils03swagger
    @youmils03swagger15 жыл бұрын

    well-done video i remember proving triangles congruent in geometry lol.. i always thought that the SSA worked i was like "WHY DOESN'T SSA WORK!!" lol then someone drew two triangles with SSA but were not congruent then i was like "oh yea.." lol go SAS!!! that's the best postulate

  • @BIMPOCARMELO
    @BIMPOCARMELO10 жыл бұрын

    It takes my teacher 1 hour to explain this and I still wont get it. Thank you internet.

  • @Hafel321
    @Hafel32112 жыл бұрын

    why can't my crazy geometry teacher be like you?

  • @MegaTop10things
    @MegaTop10things11 жыл бұрын

    I wish you were my teacher

  • @marsh.1421
    @marsh.14217 жыл бұрын

    Thank you this helped !

  • @PrincessMioneKag
    @PrincessMioneKag16 жыл бұрын

    ...I never learned Geometry. I'm in 9th grade and take Pre-calc...so right now I'm thankful for that.

  • @aishpreetsingh8379
    @aishpreetsingh83796 жыл бұрын

    I under stood this thanksmam

  • @Hengistnew
    @Hengistnew15 жыл бұрын

    Math is cute by definition. She seems cute too, so she is the right person for this work. End of the proof. Incidentally, I'm gonna see all his videos!

  • @hasithk8973
    @hasithk89736 жыл бұрын

    Thanks it was really useful..

  • @Jesteresque20
    @Jesteresque2012 жыл бұрын

    Thanks for the video, it really helped. :)

  • @araiyina3337
    @araiyina33372 жыл бұрын

    I understood this much better than my teacher, why don’t they teach kids like this

  • @Border717
    @Border71712 жыл бұрын

    i was looking for different postulates..this stuff is all easy its jsut when you forget it...

  • @catracha0212
    @catracha021213 жыл бұрын

    i understood it so much clearer than the way my geometry teacher explained it ._.

  • @ashishpandey3741
    @ashishpandey37417 жыл бұрын

    thanks for this help

  • @Pittaz
    @Pittaz13 жыл бұрын

    More help on Year 10 similar and congruent triangle Please!!!!!

  • @davidmorales2859
    @davidmorales28597 жыл бұрын

    Angle Side Side IS possible. As long as the triangles have a right angle, then it will be HL

  • @overheaven8684
    @overheaven86842 жыл бұрын

    yoooo ong u a real one fr🙏🙏💯

  • @LC-fq4cv
    @LC-fq4cv11 жыл бұрын

    -.Thankyou! It's a great help for me!

  • @priyal8163
    @priyal81632 жыл бұрын

    Thanks for the last minute help

  • @venzchbismanos884
    @venzchbismanos8842 жыл бұрын

    Iam only days old when this video is made, now im here to learn math😀

  • @cashbeastegaming
    @cashbeastegaming3 жыл бұрын

    I was 27 days old when this came out lol not even a month old even if you count the shortest month

  • @pankajkumar-ry8yi
    @pankajkumar-ry8yi10 жыл бұрын

    ASS does not hold since we may have diffrent triangle with same angle side side measurement

  • @hidrocalida12
    @hidrocalida1211 жыл бұрын

    Awesome video!:)

  • @spiderlavi
    @spiderlavi8 жыл бұрын

    uhm what

  • @owogamingguy

    @owogamingguy

    3 жыл бұрын

    noob

  • @mariezette13
    @mariezette1312 жыл бұрын

    can we consider the part D as Angle Side Side (ASS) ? can you post about the theorems ;)

  • @Karoligugu
    @Karoligugu15 жыл бұрын

    Thanks a lot for your help! I have a midterm and was totally lost, and watching your video helped me a lot.

  • @adolfoorozco3650

    @adolfoorozco3650

    3 жыл бұрын

    How’d it go

  • @armyforever-by3hs
    @armyforever-by3hs5 жыл бұрын

    you help so much thanks

  • @TheNarniafan04
    @TheNarniafan0413 жыл бұрын

    i don't know what my problem is with proving...i just don't get the sense of it...but tnx for the vid...was a great help...God Bless!!!

  • @s0ccer4life1994
    @s0ccer4life199411 жыл бұрын

    Thanks!

  • @ajd2466
    @ajd246614 жыл бұрын

    AAA does not work because the side lengths can be differnent, however there is no problem with SSA

  • @semajnor070195
    @semajnor07019513 жыл бұрын

    proving is important. we can use it in our daily lives!

  • @PrestoPovs

    @PrestoPovs

    2 жыл бұрын

    11 years ago :o

  • @hillcat7685
    @hillcat768510 жыл бұрын

    Talk more about the Angle-Side-Side case. Though not sure, there is mathematically half chance it is.

  • @powerinformation

    @powerinformation

    10 жыл бұрын

    are you refering to the the ASS case?

  • @MythicalGirl21

    @MythicalGirl21

    9 жыл бұрын

    There is no ASS (hehe lol), but seriously.

  • @jelinsimilien8600

    @jelinsimilien8600

    9 жыл бұрын

    Lol been trying to get my teacher to understand it must exist i mean ASA who wouldn't try as hard as they could to make that work lol.

  • @CDolph296
    @CDolph29614 жыл бұрын

    It only works on a right triangle, and is therefore known as the HL postulate.

  • @kritikatyagi7627
    @kritikatyagi76277 жыл бұрын

    thank you

  • @MrWeiden1991
    @MrWeiden199111 жыл бұрын

    i could not understand the no d . please explain it here , or anyone else here to explain me why d is not congruent

  • @emeraldmorn
    @emeraldmorn15 жыл бұрын

    where is the proof of the A-A-S theorem? i need it! where's the stuff for math majors? glad this is here for guys that need it though.

  • @PInkyQ0819
    @PInkyQ081913 жыл бұрын

    made it seem so easy..

  • @11234Kevin
    @11234Kevin11 жыл бұрын

    And for d) can't it be HL if there is a right angle sign?

  • @aero2146
    @aero214612 жыл бұрын

    Nice hand writing:)

  • @nicolem5140
    @nicolem51409 жыл бұрын

    Her voice will kill me

  • @GrizzlyJizz
    @GrizzlyJizz10 жыл бұрын

    Omg that stare at the end

  • @kookietales4671

    @kookietales4671

    3 жыл бұрын

    Comes in my dreams 😭🙈🙈

  • @thinabasela2353
    @thinabasela2353 Жыл бұрын

    Thanks😊

  • @ThomasBHofSoCal
    @ThomasBHofSoCal13 жыл бұрын

    figure D: if SSA is congruent to SSA, wouldn't the unmarked sides have to be congrurent - making SSA a valid postulate?

  • @whosan37
    @whosan3716 жыл бұрын

    ..hmm but there is another posibility of congruency right? am not too sure but i think there's one that has hypotenuse in it..but am not sure

  • @icanflyfaraway
    @icanflyfaraway14 жыл бұрын

    thanks :-)

  • @REXY720
    @REXY7204 жыл бұрын

    Soooo they gave us this to review during the corona quarantine

  • @dsblu10
    @dsblu1014 жыл бұрын

    My teacher always says "ASS doesn't work and AAA doesnt work" AAA as in the insurance company.

  • @ashleymabelin6152
    @ashleymabelin61522 жыл бұрын

    Only thing to say is I like her handwriting lol. And its pretty easy to understan.

  • @wrkin90044
    @wrkin9004411 жыл бұрын

    You're an amazing teacher, like wow you taught me in 3 minutes!

  • @Jusman010
    @Jusman01012 жыл бұрын

    @Kbanasko How'd the exam go?

  • @xX7xKristen8Xx4x
    @xX7xKristen8Xx4x12 жыл бұрын

    @AngelRestivo because the 2 sides with only one line are congruent to each other, and the 2 sides with two lines are congruent to each other:)

  • @8322dbschooltopper
    @8322dbschooltopper14 жыл бұрын

    She didn't give an example for the RHS type of congruency. In RHS axiom, there should be a right-angle, a hypotenuse and a side.

  • @ashdos7205
    @ashdos72053 жыл бұрын

    Just realized this was 12 years ago.... before online school for corona...😵🤧

  • @kookietales4671

    @kookietales4671

    3 жыл бұрын

    Same LMAO 😂😭😭😭

  • @AngelRestivo
    @AngelRestivo12 жыл бұрын

    why are there two lines on one side of the triangle and only one line on the other side of the triangle??

  • @Jon-up8hy
    @Jon-up8hy4 жыл бұрын

    I don't know how u predict the next step I have tried tons of questions but I cant learn plz help b

  • @aariyenmurray9714
    @aariyenmurray971411 жыл бұрын

    wayching every math video on youtube ..finals tomorrow

  • @youmils03swagger
    @youmils03swagger15 жыл бұрын

    In A, B, and C, the triangles are equal, but in D, the triangles are not necessarily equal.

  • @SuperYounqmoney
    @SuperYounqmoney12 жыл бұрын

    thx

  • @Kat-jm2eu
    @Kat-jm2eu3 жыл бұрын

    You’re scaring me with that stare 😳

  • @kittyduh
    @kittyduh16 жыл бұрын

    thank you!

  • @pranshumittal3947

    @pranshumittal3947

    4 жыл бұрын

    Hi after 12 years

  • @pranshumittal3947

    @pranshumittal3947

    4 жыл бұрын

    Hope you are there.....

  • @CHamp001

    @CHamp001

    3 жыл бұрын

    From 2021

  • @edralynbaguio3615
    @edralynbaguio361512 жыл бұрын

    IT REALLY HELPS A LOT..... ^_^

  • @muna889
    @muna88912 жыл бұрын

    i didnt get what i was looking for. i wanted to figure out the side names and the angle names which she didnt mention. i guess everybody can figure out SSS and ASA

  • @Jackthepup
    @Jackthepup4 жыл бұрын

    RHS is also used

  • @mark7001000
    @mark700100010 жыл бұрын

    Wow! But please add letters to the sides to easily identify...