### 1857 - The Knights Of The Round Table

Posted:

**Sat Jun 02, 2012 2:51 pm**Page **1** of **1**

Posted: **Sat Jun 02, 2012 2:51 pm**

Posted: **Mon Jul 09, 2012 8:35 am**

Hi!... Is r= A/p ( p= (a+b+c)/2 and A= Sqrt(p*(p-a)*(p-b)*(p-c)) ) the solution in this problem? [Because I looking for the radius of the inscribed circumference] Then I must round to 3 decimal digits. ???

Why I get WA??? please help me!

Why I get WA??? please help me!

Posted: **Thu Jul 19, 2012 6:53 pm**

Your problem is that this is the ecuation for the cicunscribed circunference.

Posted: **Fri Jul 20, 2012 8:28 am**

Sorry but that is the equation of the radius of the inscribed circumference , the formula of the radius of the circumscribed circumference is R=(abc)/(4A) . I already found my error and it was not in the formula, but rather I should check that the data were positive and the triangular inequality (things that the problem didn't specify , but...)Phantom wrote:Your problem is that this is the ecuation for the cicunscribed circunference.

Anyway, thank you to go in my help. I already get an Accepted

Posted: **Sat Jul 28, 2012 4:24 pm**

Yes, you are rigth. Sorry for that. But... I get an accepted too, and I haven't check anithing...

Posted: **Sun Jul 29, 2012 9:17 pm**

No problem!!Phantom wrote:Yes, you are rigth. Sorry for that...

????Phantom wrote: I get an accepted too, and I haven't check anithing...