Can you prove that this construction works? If I understood your steps correctly, it appears to give about a 69 degree angle which matches your measurement of the angle.
I constucted triangles 72 18 90 and 72 54 54 using value of trig functions cos(72) for right triangle sin(54) for isosceles triangle These two triangles can be useful for construction of regular pentagon
@@diptihirani167 This is wrong. Draw for youself on a precise mathematics application like geogebra and then prove it. This construction produces an angle of 68.8 degrees.
No good! At 1:13 in your video, you draw a line between the point of intersection of two arcs and an arbitrary point on your original line, in an attempt to construct a 90-degree angle. That is not allowed under the rules of Euclidean construction--you must place your straight edge between two defined points, but you have only one. Even if you did properly construct your initial 90-degree angle, your final result would not be 72 degrees. You must prove your result using the postulates and theorems of Euclidean geometry--measuring with a protractor is not proof! If you really want to construct a 72-degree angle, you can follow the procedure--discovered by the Pythagoreans--for constructing a regular pentagon. The Pythagoreans in fact adopted the 5-pointed star as their emblem after solving the problem of constructing a regular pentagon. It is an interesting story that you may want to look into. It involves dividing the radius of a circle in the extreme and mean ratio, known also as the "golden mean," and constructing triangles inside the circle, one of whose angles turns out to be 72 degrees. I hope you will take down the above erroneous video and replace it with the correct procedure.
Не надо было так всё усложнять что сами запутались))(( Тем более транспортир под рукой А попробуй в своём разуме покрути (если тут каждую каплю воды чистой нет потому что последние то что бог выделяет пытаются вытянуть или козни строят планы на тебя а сами жыруют и насмехается над тем что ты умный и живёшь Вместе где не семья а убийца кровные враг) тригонометрические ?
However accurately I try, it always comes up as 68° & not 72°
Can you prove that this construction works? If I understood your steps correctly, it appears to give about a 69 degree angle which matches your measurement of the angle.
I have construction easy to understand
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube
Hey the angle which you have made it is incorrect (72°) I have constructed and mine is coming 68.5°
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
I constucted triangles 72 18 90 and 72 54 54
using value of trig functions
cos(72) for right triangle
sin(54) for isosceles triangle
These two triangles can be useful for construction of regular pentagon
2:43 You did not construct 72° You constructed ≈68.794° in an educational video that is up for 5 years and have 53K view. Amazing.
This is incredibly wrong! With computer program recreation of this method using Autodesk Inventor it gave me not 72 degrees but 68.79 degrees!
Get lost its correct
@@diptihirani167 This is wrong. Draw for youself on a precise mathematics application like geogebra and then prove it. This construction produces an angle of 68.8 degrees.
Incredibly wrong? He just added two degrees to the wrong side of 70 on his clear protractor. That's all. Take a walk or something.
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
@@ssreeni00 how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
Thank you
Couldn't get 72 degree. 3 times I did the same step... Always get 69 degrees
Thanks 😊 ur diag. helped me ..
No good! At 1:13 in your video, you draw a line between the point of intersection of two arcs and an arbitrary point on your original line, in an attempt to construct a 90-degree angle. That is not allowed under the rules of Euclidean construction--you must place your straight edge between two defined points, but you have only one. Even if you did properly construct your initial 90-degree angle, your final result would not be 72 degrees. You must prove your result using the postulates and theorems of Euclidean geometry--measuring with a protractor is not proof! If you really want to construct a 72-degree angle, you can follow the procedure--discovered by the Pythagoreans--for constructing a regular pentagon. The Pythagoreans in fact adopted the 5-pointed star as their emblem after solving the problem of constructing a regular pentagon. It is an interesting story that you may want to look into. It involves dividing the radius of a circle in the extreme and mean ratio, known also as the "golden mean," and constructing triangles inside the circle, one of whose angles turns out to be 72 degrees. I hope you will take down the above erroneous video and replace it with the correct procedure.
খুব ভালো
it iss wrong ❌ it is 📐 either 68 or 69..dont fool anyone...
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
Thank u , could u please make a video on 86 degree construction
Very helpful.
Its totally incorrect ❌
Do not follow these steps in your exams
THANKS A LOT
Your process is wrong as the above-drawn angle measures 68 degrees. Please check it properly.
You have to mention which two angles we have to bisect to het 72degree
Mst
Nice , I watched it wonderful explanation
Thanks for ur help :)
Thnx bro. Very helpful work. Love you bro. Keep it up.😘😘😁😁
You have constructed an angle of 69 degree
You have constructed an angle measuring 68°-70° .
68° ka angle bnaya aapne nah ki 72° ka
Hello bhai camera ulta rakha ha
Thanks bhai
👍👍👍
Super
Thank you very much!!🙌🏻
Can you draw 67
?? AT 2:15, I SEE 68 degrees ?!
No bro. it's 72degree.
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
Really excellent!!
This is inaccurate. its a Crooked method
On extension of the vertical line, you straight edge was misaligned. Thus its crooked
Thanks
thanks
This method for constructing 72 degrees did not give a good result
It gave me 68 degrees not 72 degrees
Thank you sir
Thanks..or haan aapne bhut achhe se smjhaya
Good video
Sir this wrong its not 72 degree kindly show the other method
Aapka matbhed wrong h 68° bana pehle wala 72° nahi hoga
That's 68... Not 72.. 😢
Я знаю что теорема Пифагора не верна. И Пока не скажу ничего
Вот и сказал
You are a genius
A perfect 72 degrees, see you next time
Bro it's coming out 71 only
It's so much thanks for showing us
Your 72 deg method does not work
Your protector is showing 68 deg
This doesn’t work mathematically too
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
Very simple, very wrong!
Не надо было так всё усложнять что сами запутались))((
Тем более транспортир под рукой
А попробуй в своём разуме покрути (если тут каждую каплю воды чистой нет потому что последние то что бог выделяет пытаются вытянуть или козни строят планы на тебя а сами жыруют и насмехается над тем что ты умный и живёшь Вместе где не семья а убийца кровные враг) тригонометрические ?
U have constructed wrong angle
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube
This is wrong sir 72drgree aaya hi nahi aapka
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
It's not 72 it is 69 degree angle
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
Bhai kuch gadbad h ye correct nahi h
Lpet ke bna rha hai acha samjho 75 ke bna ke aur 72 bol rha hai
how to construct 18 degree angle with the help of compass and scale with proof. this available on youtube. search this on youtube.
This is 69 derees
Thankyou bro😄
It is very helpful in exams
Thankyou very much ☺️😊
its wrong
It is not 72 degree
Thank you