Circles in the Coordinate Plane

Question 1

What is the Equation of a Circle with center (h,k) and radius r?

Answer 1

((x-h)^2)+((y-k)^2)=r^2.

Question 2

What do you use to write the Equation of a Circle?

Answer 2

The center (h,k) and the radius r.

Question 3

What is the Circumcenter Theorem?

Answer 3

The Circumcenter of a Triangle is Equidistant from the Vertices of the Triangle.