How to find the Area of a pentagon

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  • เผยแพร่เมื่อ 16 ม.ค. 2025

ความคิดเห็น • 111

  • @alexchristian5399
    @alexchristian5399 4 ปีที่แล้ว +34

    Thank you so much I couldn’t find a video for doing it with a pentagon and you just did the exact same problem for me. My teacher still says the answer is wrong but that’s just her

    • @darwinfromjupiter5817
      @darwinfromjupiter5817 4 ปีที่แล้ว +1

      Lmao

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว +3

      I would love to know why she thinks it is wrong. I do a lot of rounding here.... maybe? Also sorry for late reply.... I am really just learning about comments in this thing. If you have any other questions about math, shoot me a message.... hopefully I can get to it

    • @alexchristian5399
      @alexchristian5399 3 ปีที่แล้ว

      @@danielschaben I honestly have no clue that was my 9th grade geometry teacher and it was a question on the homework if I believe. When I submitted the assignment I didn’t get the points for that problem I think she rounded to a different decimal when doing the equation

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว +2

      @@alexchristian5399 UGHHH that is what I thought. I don't ever diss teachers because our job is hard as FFFF. But some times I want to pull my hair out. It is wrong because it is rounded incorrectly... OMG.... I am sorry if that is truly the case...

    • @alexchristian5399
      @alexchristian5399 3 ปีที่แล้ว

      @@danielschaben it definitely wasn’t your fault and it wasn’t a big deal to me anyway, she rounded to a smaller (I think it was the thousands) decimal when doing anything so it would have been me just being lazy and not converting what you did to how she did it but overall this problem really helped me because I would have failed that test without at least knowing the equation for pentagons so thank you

  • @pantojafambam5087
    @pantojafambam5087 5 ปีที่แล้ว +86

    Better then my math teacher wish me luck for my test tomorrow 🙏

    • @LavenderWordsworth
      @LavenderWordsworth 5 ปีที่แล้ว +3

      Tell me ur grades

    • @daudhussain8251
      @daudhussain8251 4 ปีที่แล้ว +3

      Grades

    • @Kizimfn
      @Kizimfn 4 ปีที่แล้ว +4

      I did this in grade 3 and i got a 98 :) Canada schools btw

    • @heapt1
      @heapt1 4 ปีที่แล้ว +1

      Daud Hussain thankfully it wasn’t health care

    • @Uhhhhhh_Idkman
      @Uhhhhhh_Idkman 4 ปีที่แล้ว

      lol i have a test right now

  • @calvinnigh5489
    @calvinnigh5489 6 ปีที่แล้ว +12

    Those two dots You left are killing me

  • @saminshohel4579
    @saminshohel4579 6 ปีที่แล้ว +5

    thank so so much u just solved my problem within seconds keep up your good work

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว

      Wow, I can't believe I missed this. So glad I helped you! Two years ago.... I hope you are working for space X now and getting ready to launch SN11. Or the equivalent of that in whatever you are doing on the planet.

  • @Biz503
    @Biz503 6 ปีที่แล้ว +2

    brilliant very good at explaining and keeping it simple

  • @maxpercer7119
    @maxpercer7119 2 ปีที่แล้ว +1

    For those who want the full formula for the area of an n-gon with sides of length s,
    by partitioning the regular n-gon into n isosceles triangles with altitude called the apothem (a),
    we get area A = 1/2 * s * a * n .
    Typically the apothem length is given , but it is not necessary to find the area since by trigonometry
    a = s / ( 2 tan (180° / n ) ), and then by substitution (and simplifying)
    A = (s^2 * n) / ( 4 tan (180° / n ) ).

  • @zeeshanchopda8489
    @zeeshanchopda8489 6 ปีที่แล้ว +5

    thanks now you will pass men in maths

  • @incizor1273
    @incizor1273 ปีที่แล้ว +2

    Just a small note: those triangles can’t be regular since that means each angle is 60 degrees and you determined that the angle in the centre is 72 degrees. But I guess they are isosceles and bottom angles are (180-72)/2= 108/2= 54 degrees each.

    • @danielschaben
      @danielschaben  ปีที่แล้ว

      Yes they are. Iscosceles. It is possible regular slipped out as I do not script these

  • @DylanMarie620
    @DylanMarie620 4 ปีที่แล้ว +5

    Oh gosh this was life saving

    • @danielschaben
      @danielschaben  4 ปีที่แล้ว +1

      Glad I could help

    • @uniqueartofvaibhavi5600
      @uniqueartofvaibhavi5600 3 ปีที่แล้ว

      I don't understand. I am in class 5😭

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว

      @@uniqueartofvaibhavi5600 Send me a message can you direct message me? I don't understand how communications work in youtube land.... I would gladly make videos for you as often as I could.

  • @shouritamraparni2730
    @shouritamraparni2730 4 ปีที่แล้ว +3

    This is brilliant thank you 😬

  • @tinkywinky_teletubby7212
    @tinkywinky_teletubby7212 9 หลายเดือนก่อน

    Thank you so much, you pointing out abput switching to degree on the calculator saved me so badly!

  • @adrislijp8986
    @adrislijp8986 6 ปีที่แล้ว +3

    Thanks this helped me lots :)

  • @deviousdeclan8478
    @deviousdeclan8478 5 ปีที่แล้ว +1

    Helped so much! Thanks a lot!

  • @yousifkamaash5218
    @yousifkamaash5218 4 ปีที่แล้ว +2

    Thank you for these lectures and I have a question about an equal sides Pentagon inscribed inside a triangle the vertix of Pentagon on the base of triangle , the dimensions of the triangle are 77, 106 , the base 113 . with my best regards .

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว +1

      I am just figuring out this comment thing..... I am intrigued by your question, but don't understand it. I think this problem would be super cool, but can't picture it from your description

  • @NPERROTTE75
    @NPERROTTE75 ปีที่แล้ว +1

    I believe this video helped me to remember what to do using Trigonometry.

  • @jakob7722
    @jakob7722 6 ปีที่แล้ว +5

    Thank you

  • @abigailchua3860
    @abigailchua3860 3 ปีที่แล้ว +1

    Thank you so much sir.

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว +1

      You are very welcome. So glad I could help!

  • @akashchaudhari9858
    @akashchaudhari9858 5 ปีที่แล้ว +1

    Thanks this helped a lot

  • @Iris-tl7ld
    @Iris-tl7ld 7 ปีที่แล้ว +1

    Thank you this really helped :-D

  • @Ooh_Very_Berry
    @Ooh_Very_Berry 4 ปีที่แล้ว +1

    What if the side is an equation with variables?

    • @danielschaben
      @danielschaben  4 ปีที่แล้ว

      What is the expression and the number of sides? I could make the video tonight. But really everything is the same you would just substitute the expression in for the side length. My guess is your problem comes out to some nice expression at the end.

    • @Ooh_Very_Berry
      @Ooh_Very_Berry 4 ปีที่แล้ว

      @@danielschaben "15/7x - 13(1.618)/3" is the side.. It's reallyyyyy hard and my teacher's example was very far from her quiz..

    • @Ooh_Very_Berry
      @Ooh_Very_Berry 4 ปีที่แล้ว

      @@danielschaben oh and it's also a pentagon

    • @danielschaben
      @danielschaben  4 ปีที่แล้ว

      @@Ooh_Very_Berry Will try and get that up tonight. For central timezone... it will be 10 pm or so

    • @Ooh_Very_Berry
      @Ooh_Very_Berry 4 ปีที่แล้ว

      @@danielschaben ok thank youuu

  • @parasaarti3553
    @parasaarti3553 5 ปีที่แล้ว +1

    I like the
    video

  • @NarenlynMimari
    @NarenlynMimari 8 หลายเดือนก่อน

    Please can you find the height of the Pentagon

  • @GG89..
    @GG89.. 3 ปีที่แล้ว

    Thank you for the help!!

  • @plainki2174
    @plainki2174 7 ปีที่แล้ว +3

    Life saver

  • @darwinfromjupiter5817
    @darwinfromjupiter5817 4 ปีที่แล้ว +1

    Thank you so much

  • @BoiBook
    @BoiBook 4 ปีที่แล้ว

    Very nice! I also did the math like this way!

  • @bells9907
    @bells9907 3 ปีที่แล้ว

    what age is this aimed towards???

  • @sammeh5662
    @sammeh5662 3 ปีที่แล้ว

    Thank you so much, this helped a lot.

  • @onlinethings9238
    @onlinethings9238 3 ปีที่แล้ว

    sir thank yo for he help but I never knew pentagrams was going to be this complex lol

  • @subratabhattacharya6496
    @subratabhattacharya6496 4 ปีที่แล้ว

    Why did not we use pythogorous theorem to calculate the value of 'a' ??? Please explain ? Is not the value of the hypotenuse is 12 ?

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว

      I hate that I did not see this until now. If this was a hexagon, it would be 12. But as a pentagon you have to use right triangle trig with Sine, cosine, and tangent to figure out the apothem and the radius

  • @ArionnaBehounek
    @ArionnaBehounek 8 หลายเดือนก่อน

    Yall I'm doing this the night before my end of year exam, blud out hear saving lives 😭

  • @atlast7035
    @atlast7035 3 ปีที่แล้ว +1

    0:53: They are not regular triangles.

    • @danielschaben8312
      @danielschaben8312 3 ปีที่แล้ว +1

      Correct. I should script these before I make them. But it just doesn't always work out. Thanks for the catch and comment.

    • @atlast7035
      @atlast7035 3 ปีที่แล้ว

      @@danielschaben8312 I'm glad I could be of assistance! And we all make mistakes, plus this was just a minor one, but I thought it was worth noting.

  • @sbricks5450
    @sbricks5450 6 ปีที่แล้ว

    Thanks so much!

  • @AAVlogs-id4mm
    @AAVlogs-id4mm 6 ปีที่แล้ว

    How did u get 5 ?

  • @MandeepSingh-mx1qf
    @MandeepSingh-mx1qf 4 ปีที่แล้ว

    Is adjacent always 6 over a

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว

      I wish I would have seen this sooner. I think you mean Tangent of the angle. It is only 6 because of the length of the sides. But with a pentagon you could come up with all apothems by using tan(36)=(opposite side/apothem)

  • @jimmymchugh8305
    @jimmymchugh8305 4 ปีที่แล้ว +1

    Cheat draw a oblong box around it then cut out pentagon -assemble surrounding triangles firm them into box minus it from original box =

  • @gangwal4562
    @gangwal4562 6 ปีที่แล้ว +1

    gud

  • @oofoof5208
    @oofoof5208 5 ปีที่แล้ว

    My google calculator got something different for tan(36)?

    • @danielschaben
      @danielschaben  5 ปีที่แล้ว

      Check to make sure it is in degrees and not radians

  • @Moistcrafter
    @Moistcrafter 3 ปีที่แล้ว

    Noice, but how to calculate volume for a 12 sided pentagon object

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว

      Similarly. It just takes a different central angle. 360/12 to get it. This method works for all regular polygons. Thanks for the comment!

  • @TheMagicSquirrelofDoom
    @TheMagicSquirrelofDoom 6 ปีที่แล้ว

    thanks

  • @granttaylor5571
    @granttaylor5571 5 ปีที่แล้ว

    I love math class with my teacher mr schaben

  • @justdailylaura9518
    @justdailylaura9518 3 ปีที่แล้ว

    anyone else here just 2 days before their math test 😅

  • @kimberlygiliberti2441
    @kimberlygiliberti2441 4 ปีที่แล้ว +1

    i love math

  • @adedoyinoka6164
    @adedoyinoka6164 2 หลายเดือนก่อน

    I dont understand it my head will explode 😢 i can't take it anymore 😭,and why did we not just multiply both sides by six rather than crossmultiply it at first

  • @ackaston8746
    @ackaston8746 ปีที่แล้ว

    I can do one with only side length 😂 and I'm only a child 😂

  • @DocoMoro
    @DocoMoro ปีที่แล้ว

    247,8

  • @Southmovies509
    @Southmovies509 2 ปีที่แล้ว

    Please tell hjndi

  • @rambadan4609
    @rambadan4609 2 ปีที่แล้ว +1

    Indian

  • @oj6633
    @oj6633 4 ปีที่แล้ว

    All that just to find a goddamn apothem

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว

      I love this comment. I feel the same way about math some times.

  • @jallani19
    @jallani19 11 หลายเดือนก่อน

    WESTERN nation students using calculators.
    Asians laughing in the corner.

  • @abdulrazak1601
    @abdulrazak1601 3 ปีที่แล้ว

    csv340021 021 vss

  • @lodshane3630
    @lodshane3630 3 ปีที่แล้ว

    Laura

  • @mihaleben6051
    @mihaleben6051 8 หลายเดือนก่อน

    This even worse than usual dear god.

  • @robertlaughton2270
    @robertlaughton2270 3 ปีที่แล้ว

    overly complycated

    • @danielschaben
      @danielschaben  3 ปีที่แล้ว

      probably. thanks for comment. i'll see if i can simplify.

    • @bells9907
      @bells9907 3 ปีที่แล้ว

      @@danielschaben I thought it was rlly simple

  • @lakshitathiside
    @lakshitathiside 3 ปีที่แล้ว +1

    Thank you