Geometry is a branch of mathematics that deals with the measurement, properties, and relationships of points, lines, angles, plane and solid figures. The part of geometry that studies about points, lines, angles, flat(plane) surfaces & their properties is called plane geometry. The other part which studies rigid three-dimensional objects and their properties is called solid geometry.

In this unit, you will be introduced with the basic concepts of plane geometry like angles, parallel lines, triangles, polygons, quadrilaterals and their properties and measurement.