Use the information given to write the equation of a circle.  A. center: (-10, -4), point on a circle:      (4, -2) B. Endpoints of diameter (13, -1) and (-15, 9)

Two-dimensional figure measured in terms of radius. It is formed by a set of points that are at a constant or fixed distance from a fixed point in the center of the plane. The parts of the circle are circumference, radius, diameter, chord, tangent, secant, arc of a circle, and segment in a circle.