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
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
@@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
@@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...
@@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
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.
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 ) ).
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.
@@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.
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 .
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
@anzhang314 yes. Trig is more useful. I hate using the formulas. About all you ever need for area formulas rectangle and circle and if you know how a circle area is derived from a rectangle. Rectangle is all you need
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.
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
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)
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
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
Lmao
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
@@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
@@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...
@@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
Better then my math teacher wish me luck for my test tomorrow 🙏
Tell me ur grades
Grades
I did this in grade 3 and i got a 98 :) Canada schools btw
Daud Hussain thankfully it wasn’t health care
lol i have a test right now
Those two dots You left are killing me
thank so so much u just solved my problem within seconds keep up your good work
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.
I believe this video helped me to remember what to do using Trigonometry.
Glad it was useful!
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 ) ).
Thank you so much, you pointing out abput switching to degree on the calculator saved me so badly!
brilliant very good at explaining and keeping it simple
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.
Yes they are. Iscosceles. It is possible regular slipped out as I do not script these
thanks now you will pass men in maths
This is brilliant thank you 😬
You’re welcome 😊
Yall I'm doing this the night before my end of year exam, blud out hear saving lives 😭
Thanks this helped me lots :)
Oh gosh this was life saving
Glad I could help
I don't understand. I am in class 5😭
@@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.
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 .
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
Helped so much! Thanks a lot!
Thank you so much sir.
You are very welcome. So glad I could help!
Thank you for the help!!
Your welcome!
You are not your
Please can you find the height of the Pentagon
Thanks this helped a lot
you are welcome!
Thank you
Thank you so much, this helped a lot.
You are Welcome! Glad it was useful
:)
Can you do it without trigg?
@anzhang314 yes. Trig is more useful. I hate using the formulas. About all you ever need for area formulas rectangle and circle and if you know how a circle area is derived from a rectangle. Rectangle is all you need
Thank you so much
You're most welcome
Very nice! I also did the math like this way!
sir thank yo for he help but I never knew pentagrams was going to be this complex lol
Thank you this really helped :-D
What if the side is an equation with variables?
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.
@@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..
@@danielschaben oh and it's also a pentagon
@@Ooh_Very_Berry Will try and get that up tonight. For central timezone... it will be 10 pm or so
@@danielschaben ok thank youuu
I like the
video
Cheat draw a oblong box around it then cut out pentagon -assemble surrounding triangles firm them into box minus it from original box =
Fabulous
Why did not we use pythogorous theorem to calculate the value of 'a' ??? Please explain ? Is not the value of the hypotenuse is 12 ?
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
Life saver
0:53: They are not regular triangles.
Correct. I should script these before I make them. But it just doesn't always work out. Thanks for the catch and comment.
@@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.
what age is this aimed towards???
Highschool
Thanks so much!
Noice, but how to calculate volume for a 12 sided pentagon object
Similarly. It just takes a different central angle. 360/12 to get it. This method works for all regular polygons. Thanks for the comment!
Is adjacent always 6 over a
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)
gud
My google calculator got something different for tan(36)?
Check to make sure it is in degrees and not radians
I love math class with my teacher mr schaben
I do the best I can:)
anyone else here just 2 days before their math test 😅
Good Luck! Study hard
How did u get 5 ?
there are 5 equal triangles
@@danielschaben your a genius
thanks
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
I can do one with only side length 😂 and I'm only a child 😂
Indian
i love math
So do i.
247,8
Please tell hjndi
csv340021 021 vss
All that just to find a goddamn apothem
I love this comment. I feel the same way about math some times.
WESTERN nation students using calculators.
Asians laughing in the corner.
Laura
This even worse than usual dear god.
overly complycated
probably. thanks for comment. i'll see if i can simplify.
@@danielschaben I thought it was rlly simple
Thank you