. Meaning of the Constants in Equation of a Right Line Equation of a Right Line in terms of its Intercepts on the Axes. in terms of the Perpendicular on it from Origin, and the Angles it makes

Equation of Circle . . . : i . . Conditions that general Equation may represent a circle Coordinates of Centre and Radius Condition that two Circles may be concentric,

Expression of Coordinates of Point on Circle by auxiliary Angle Problems where a variable Line always touches a Circle Examples on Circle solved by Polar Coordinates .