Euclidean Geometry | Proportionality Theorems & Midpoint Theorem Explained | Grade 12 Exam Prep

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  • เผยแพร่เมื่อ 16 ธ.ค. 2024

ความคิดเห็น • 82

  • @kgaogelolebatamela8029
    @kgaogelolebatamela8029 2 ปีที่แล้ว +362

    hi sir, i'd like to thank you very much. last year i was doing my matric and i watched your physical sciences tutorials. i moved from getting 40s to getting 73% on my final year results. i can never thank you enough, but your vidoes really helped me. i still enjoy watching your tutorials to this day and i have recommended my friends that are doing matric this year to your channel, hopefully they will find the tutorials helpful too. once again, thank you very much sir

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว +71

      Wow… I am so grateful to hear your story. We continue to serve you well… thank you for recommending our channel to you friends.
      And a big congratulations on your results 😃🤗

  • @LeoMash-h1x
    @LeoMash-h1x หลายเดือนก่อน +4

    Best teacher ever❤️

  • @thapelolebakeng
    @thapelolebakeng 6 หลายเดือนก่อน +36

    Love your work but I always have to play it 2x speed 😭

    • @MlungisiNkosi
      @MlungisiNkosi  6 หลายเดือนก่อน +9

      And I have absolutely no qualms with that… Thank you so much 😊

  • @juliaphalatse2861
    @juliaphalatse2861 2 ปีที่แล้ว +27

    Greatest Teacher I have ever seen in my entire life👌❤ thank u for helping Us
    May God bless u ❤

  • @sibongileyokwana2287
    @sibongileyokwana2287 หลายเดือนก่อน +1

    I'm currently busy with mathematics, i did maths lit in high school so i want to add pure maths. At first i thought you were talking a little slow for me. I opted and watched others. But now. You the only teacher i watch. You are amazing. I failed Eucledian from term 2 and prelim but i now have a better understanding because you started your lessons from as early as grade 9. Wena I'll buy you cold drink after my exams 😂😂. Thank you.

  • @kwenagwendoline5551
    @kwenagwendoline5551 2 ปีที่แล้ว +13

    I didn't know i understand maths until meet sir m great full sir thanks for the work u a doing. U a professional

  • @vhutaliprinces7219
    @vhutaliprinces7219 ปีที่แล้ว +12

    I appreciate you teaching us this excellent lesson, sir. I'll be rewriting my math exam in June of this year. I hope I'll succeed because of your videos, and sir, you mentioned that you'd upload the additional activities-but I don't see lesson 6 for Euclidean geometry

  • @TikoMokgaloane-yd1cj
    @TikoMokgaloane-yd1cj ปีที่แล้ว +20

    Thank you so much for the breakdown of the ratio, it was what I just what I needed to fully understand the prop theorem. Sir you are saving the nation 🫶🏽💐!

  • @MyJourneyTo2000
    @MyJourneyTo2000 2 ปีที่แล้ว +12

    thanks for helping me pass matric ❤

  • @potegomothata4676
    @potegomothata4676 2 ปีที่แล้ว +6

    Best teacher

  • @setlamarupingidah3258
    @setlamarupingidah3258 2 ปีที่แล้ว +13

    Hey sir...I really enjoy your lessons and they really help me alot and please try to attempt similarity theorem soon coz I'm kinda struggling with proving similarities

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว +5

      You’re welcome and your request is noted.

  • @sunnyboynhleks1926
    @sunnyboynhleks1926 10 หลายเดือนก่อน +3

    Hello sir, just a question can DE promotional to BC when it comes to proportionality

  • @rach-tech6191
    @rach-tech6191 2 ปีที่แล้ว +11

    vhakho ita mushumo wa vhudi i guess na nne ndido pass my rewrite exam nga june,thanks

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว +7

      Rolivhuwa ngamanda thi!!!
      All of God's best for your exams.

  • @winniemahlangu8860
    @winniemahlangu8860 2 ปีที่แล้ว +5

    Thank u soo much sir ,I have watched all lessons..and its been productive! ❤

  • @buyinyawo5522
    @buyinyawo5522 2 ปีที่แล้ว +3

    Sir I just wanna say you the best ❤❤ you can't be compared🏆🏆🏆

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว

      The pleasure is all mine 😍

  • @musamabuza2056
    @musamabuza2056 2 ปีที่แล้ว +3

    Thank you sir am now ready for p2

  • @thabelomphaka
    @thabelomphaka ปีที่แล้ว +5

    With Example 1, wasn't it supposed to be BC=2DE therefore the value of y=8? (Mid-point theorem)

    • @sphamandlamthembu998
      @sphamandlamthembu998 ปีที่แล้ว +4

      if they told us that we have midpoint then u can use that formula and it not 2 it half

    • @MlungisiNkosi
      @MlungisiNkosi  ปีที่แล้ว +4

      Thank you for clarifying Spha

  • @oprahmpomabiva977
    @oprahmpomabiva977 ปีที่แล้ว +5

    Hi sir I would like to ask on Theorem 3 for midpoint where you spoke about similar triangles my question is why is AC over EF and not DF

  • @Kharabian_karabo
    @Kharabian_karabo ปีที่แล้ว +2

    Thank you so much sir🙏🙏🙏

  • @pholosoleeuw4823
    @pholosoleeuw4823 2 ปีที่แล้ว +6

    Sir I don't get the last example it's a little bit confusing

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว

      Is it my explanation?

    • @pholosoleeuw4823
      @pholosoleeuw4823 2 ปีที่แล้ว +3

      @@MlungisiNkosi Yes but I understand all the other stuff except for that example

  • @EmmaBrown-bc7ye
    @EmmaBrown-bc7ye 2 ปีที่แล้ว +5

    Hi there, just wondering if it's possible to have said that AD=2x ; DB=3x and that BE=4y ; EC=3y? And if so, how would that have worked. My text book explains it in this manner, so I am now slightly confused😅

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว +5

      Don’t be confused. Adopt an approach that’s more comfortable to you or that you understand better

  • @SPhumeleleNyawose
    @SPhumeleleNyawose 2 หลายเดือนก่อน +2

    thanks sir God bless you

  • @eileenndewere6195
    @eileenndewere6195 2 ปีที่แล้ว +3

    sir so in the last example you got the ratio to be 15:8. does that mean you are saying that CP = 15 units and PD =8?🤔

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว +4

      Not at all… Please watch my introduction to proportionality. I specified that a ratio does not represent actual size but it’s a comparison of sizes relative to each other

  • @kananelolepota4450
    @kananelolepota4450 2 ปีที่แล้ว +1

    Hi sir in terms of the first example can't I take the mindle which was AE/AC ? To look for Y ...bcs if I do that it gives me a different answer

  • @Nomakhulu9173
    @Nomakhulu9173 8 หลายเดือนก่อน +3

    Is this the same as grade 11 Euclidean geometry?

    • @mbokaz.i12
      @mbokaz.i12 8 หลายเดือนก่อน +1

      NO

  • @reabetswemmonoa7774
    @reabetswemmonoa7774 2 ปีที่แล้ว +3

    Hi sir, can you make a video based on question papers,for proportionality

  • @confidencelebogang6472
    @confidencelebogang6472 2 ปีที่แล้ว +1

    Sir on Theorem 3 :is AC/EF or AC /DF?

  • @saraasare699
    @saraasare699 2 ปีที่แล้ว +1

    Great job

  • @PebetseManchidi-wr8vw
    @PebetseManchidi-wr8vw หลายเดือนก่อน +1

  • @clairepurdy7238
    @clairepurdy7238 2 ปีที่แล้ว +2

    25:21 you made a mistake sir, its AC/DF
    You said that but accidentally wrote EF

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว

      Thank you for making me aware

  • @FFax.annime
    @FFax.annime ปีที่แล้ว +1

    what about the reasons

    • @MlungisiNkosi
      @MlungisiNkosi  ปีที่แล้ว

      What about them?

    • @FFax.annime
      @FFax.annime ปีที่แล้ว

      @@MlungisiNkosi what reasons must we use

    • @celeste2221
      @celeste2221 ปีที่แล้ว

      There aren't really a lot actually.
      When you do when you equate the ratios as fractions, it's either you use prop theorem or line parallel to one side of a triangle.
      When you state that triangles are similar depending on what you proved first, you may write (SAS) or (AAA)
      When you prove two angles to be similar, the third one will automatically be equal to the remaining unused angle so your reason would be (3rd side of a triangle or sum of angles in a triangle)
      If it any point you used midpoint concepts then midpoint theorem would be your reason.

  • @ZiziphoAlupheli-fc7sw
    @ZiziphoAlupheli-fc7sw ปีที่แล้ว +1

    Is it wrong when you say DE =½BC then y will be = 8 sir 🤔

  • @vukosijeff8551
    @vukosijeff8551 2 ปีที่แล้ว +3

    Sorry sir if um wrong..I seem to not find the next lesson which you said you will be dealing about examples of proportionality

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว +3

      I’m yet to record it after my recovery…

    • @keep6821
      @keep6821 2 ปีที่แล้ว +1

      @@MlungisiNkosi we still waiting for it sir

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว +1

      @@keep6821 thanks for this reminder

    • @ubirak8788
      @ubirak8788 2 ปีที่แล้ว +3

      Should have said get well soon first, look now it has 4 months and sir hasn't uploaded them

  • @candicenkoona9791
    @candicenkoona9791 2 ปีที่แล้ว +2

    Aiiii no🔥🔥🔥

  • @thandolwethu402
    @thandolwethu402 2 ปีที่แล้ว +1

    Hi sir please do 2D and 3D shape on trigonometry 🙏🏻 grade 12

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว

      I already have… Please check from our earlier posts

  • @justlorrie5517
    @justlorrie5517 2 ปีที่แล้ว +3

    thank u sm

  • @ynfamous
    @ynfamous 2 ปีที่แล้ว +3

    @Mlungisi Nkosi Sir PLEASE RECHECK YOUR ANSWER FOR EXAMPLE ,shouldn't y=3?

    • @ynfamous
      @ynfamous 2 ปีที่แล้ว +1

      example 1 sorry

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว

      I’ll check it out, thank you

  • @rodasthoko6270
    @rodasthoko6270 2 ปีที่แล้ว +5

    Sir I think you made a mistake in similar triangles ,you suppose to say AC/DF not AC /EF
    Theorem 3

  • @jeanetterabotapi1562
    @jeanetterabotapi1562 2 ปีที่แล้ว +2

    Sir can we plz have analytical geometry videos

    • @MlungisiNkosi
      @MlungisiNkosi  2 ปีที่แล้ว +3

      I’m taking a bit of a break

  • @DinnyNdoveng-jp6no
    @DinnyNdoveng-jp6no 5 หลายเดือนก่อน +1

    The last example sir it's confusing me

  • @NONO-kh3lp
    @NONO-kh3lp 8 หลายเดือนก่อน +1

    you were not suppose to add mm when explaining the ratios ,when you are now adding units it is no longer a ratio it is now distance

    • @NONO-kh3lp
      @NONO-kh3lp 8 หลายเดือนก่อน

      and also why are you adding the parallel sides DE /BC to proportionality you are confusing me really

    • @serogolemogole2685
      @serogolemogole2685 8 หลายเดือนก่อน +1

      You're just confused by the method, there's nothing wrong with what hes doing. Watch again and you'll understand or try a different method where you express KE in terms of y such that it becomes 8/5y and then solve using your prop theorem