What is the radius of the circum circle of the triangle whose sides are 5, 12 and 13 units respectively?
option
A. 2 units
B. 12 units
C. 6.5 units
D. 6 units
E. 7.5 units

• sides of triangle are 5,12,13
  i.e triangle is right angled,hypotenuse=13
  in case of a right angled triangle, the hypotenuse is the diameter of the circumcircle
  so radius of the circum circle=13/2=6.5 units
  
• 11 years agoHelpfull: Yes(7) No(0)
• C 6.5 units
  Sides of the traingle are a=5,b=12,c=13 then
  radius of circum circle=abc/Sqrt[(a+b+c)(b+c-a)(c+a-b)(a+b-c)]
  =5*12*13/Sqrt[(5+12+13)(12+13-5)(13+5-12)(5+12-13)]=780/Sqrt(14400)=780/120=6.5
• 11 years agoHelpfull: Yes(2) No(0)