Question

If O is origin and A(1,2),B(2,3),then the circum-radius of triangle OAB in square.untis​

Answer 1

Answer:OA=b=sqrt((1-0)^2 +(2-0)^2) =sqrt(5)

similarly OB=a=sqrt(13) and AB=o=sqrt(2)

using Heron’s formula, area =sqrt(s(s-a)(s-b)(s-c)):

area of triangle OAB=A=1/2sq unit

Circumradius R=oab/4A= sqrt(65/2) units [Ans]

Step-by-step explanation: