What is the radius of the circle whose equation is x2 + y2 = 8? 2 4 64

The equation of circle of radius r whose centre is the origin (0, 0) ,

It is given by:                        ......[1]

Given the equation:

To find the radius of the circle;

Compare the given equation with [1] we have;

Taking square root both sides we get;

units

Therefore, the radius of the circle is, units

the answer is b.

step-by-step explanation:

identity property is where 0+whatever number=whatever number. basically 0+ a number.