A circle has a center of (2,-1). A point (-3,3) is on the circle. What is the radius

Answer 1

We can use the distance formula between the center and that point to find the radius. Recall that the formula for the distance between two points is:

d = √((x₂ - x₁)² + (y₂ - y₁)²)

Plugging in our points, we have:

d = √((-3-2)² + (3-(-1))²) = √(25 + 16) = √41

So the radius is √41!