RD Sharma Solutions for Class 10 Chapter 8 Circles- A circle is a shape consisting of all points in a plane that are a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves in a plane so that its distance from a given point is constant. This chapter consists of two exercises of problems dealing with properties of a tangent to a circle, tangent from a point on a circle, length of tangents, cyclic quadrilateral and other types of tangents to intersecting and concentric circles.