توجه

دوستان سلام،

لطفا توجه داشته باشید که از این لحظه این وبلاگ آرشیو می شود و فقط ممکن است پست های مهم در آن قرار داده شود.

لطفا از این پس به وب سایت جدید ما به نشانی زیر مراجعه کنید.

http://geometryislife.rozblog.com

به عنوان مژده می توانم بگویم که در وبسایت جدید،امکان ثبت نام و نیز پرسش و پاسخ فراهم آمده.(در واقع برای سایت،انجمن طراحی کرده ایم)

لذا از تمام دوستان و همراهان همیشگی خواهشمندم به وبلاگ جدید ما حتما سر بزنند.

باتشکر.

«مریم میرزاخانی»به سرطان مبتلا شد/آخرین وضعیت سلامت نابغه ایرانی

مریم میرزاخانی، ریاضیدان ایرانی و استاد دانشگاه استنفورد با بیماری سرطان دست و پنجه نرم می کند. 

مشروح خبر در ادامه مطلب... 

Music of first 301 digits of pi

IMO - SL-2008 - G4

In an acute triangle ABC segments BE and CF are altitudes. Two circles passing through the point A anf F and tangent to the line BC at the points P and Q so that B lies between C and Q. Prove that lines PE and QF intersect on the circumcircle of triangle AEF.

To see figure click here

?What is math

Math isn't the art of answering mathematical questions, it is the art of asking the right questions, the questions that give you insight, the ones that lead you in interesting directions, the ones that connect with lots of other interesting questions the ones with beautiful answers.

G. Chaitin 

Quote #1

Since  you  are  now  studying  geometry  and  trigonometry,  I will  give  you  a  problem.  A  ship  sails  the  ocean.  It left  Boston with  a  cargo  of  wool.  It  grosses  200  tons.  It is  bound  for  Le Havre..  . .There  are  12  passengers  aboard.  The  wind  is blowing  East-North-East.  The  clock  points  to  a  quarter  past three  in  the  afternoon.  It  is  the  month  of  May.  How  old  is the  captain? 

IGO2016-P3

Find all positive integers N such that there exists a triangle which can be dissected into N similar quadrilaterals.

How to draw perfect freehand circles

the duplication of the cube

There are three  famous  problems  of  antiquity.

1)the duplication  of  the  cube

2)the  trisection  of  the  general  angle

3)the  squaring  of the  circle

Which there wasn't any solution for them.

But now there are some solutions for these problems.

In this post I want you to find the answer of problem 1.

Help:

1)for this you want to make cube root of 2.

So try to draw a×f(2).(note that f(x)=cube root of x)

Contest#01

Hi everybody,

I'm holding a contest and if you want you can attend in it.

If you like you can send me your solutions by clicking here.

After 1 week the solutions will be on website and you can download it only if you are a user.so you can register here.

Download questions.

For sending solutions and other please click on following link:

Send solution and registration