Question

If end points of diameter of a circle are (4,3) and (-2,-1) then radius of circle is
a) 4113
b)23
c) V13
d) 5/13​

Answer 1

Answer:    √13 is the correct answer.

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Step-by-step explanation:

Mid point of ends of diameter is the centre of circle.

So,

Centre of circle = ( 4-2/2 , 3-1 /2)

                         = (1, 1)

So,

Using distance formula,

Radius (r) = $\sqrt{(1-4)^2 +((1-3)^2}$    = $\sqrt{9 + 4 }$ = √13