RS Aggarwal Solutions for Class 9 Chapter 5 “Coordinate-Geometry”, the coordinate geometry is an essential branch of geometry. It mainly helps us to locate the points in a plane. Its uses are spread in all fields like trigonometry, calculus, dimensional geometry etc. Coordinate Geometry in modern days is also famous as Cartesian or Analytic Geometry. The plane in which all the points are located in coordinate geometry is known as a coordinate plane. Coordinate Geometry has applications in significant fields like Aviation, Differential Geometry, Rocketry, Computational Geometry, Space Flight and Space Science. This chapter covers some of the concepts like Cartesian coordinates, coordinate system and methods used to plot a graph.