Question

Find the length of the radius for this circle.

Answer 1

We know that the 8 represent the squared radius of the circle so to get the radius we should take the square root of 8 
the answer is √8 = 2√2

Answer 2

Answer: $2\sqrt{2}$

Step-by-step explanation:

The general form of equation of a circle is given by :-

$(x-a)^2+(y-b)^2=r^2$ , where r is radius and (a,b) is the center of the circle.

The given equation of circle: $(x - 3)^2 + (y - 5)^2 = 8$

$\Rightarrow\ r^2=8$

Taking square root on both sides, we get

$\Rightarrow\ r=\sqrt{8}=2\sqrt{2}$

Hence, the length of the radius for this circle= $2\sqrt{2}$