hi,

if you are given a triangle and there is a cirlcle circumscribing it. how do you find the radius of the circle?The triangle is not special.(not a right triangle or anything)

 

is there a formula for this?

thanks

http://mathworld.wolfram.com/Circumradius.html

 

The formula can easily be combined to a shorter formula by using Heron's formula: http://mathworld.wolfram.com/HeronsFormula.html

 

[MATH]R = \frac{abc}{4A}[/MATH]