We can draw any shape with four sides or edges and four corners or vertices are known as quadrilaterals. The sum of its interior angles are 360 degree.

If three or more line or line segment formed a closed shape, then it is known as a polygon. Consider all the sides of polygon are a line or line segments.

If a polygon designed with three lines or line segments and three vertexes, then this polygon known as triangles. The sum of the internal angles of any triangles are 180 degree.

When two line are intersect in such a point. Then this point is known as vertex. The amount of rotation of one line corresponding to other is called an angle

When two or more points connected each other in every direction, then it constructs a line. i.e. A line is a collections of points.

In geometry, the point is the smallest location. It has no dimension, i.e. no width and height. A point is denoted by a dot. Here P is a point symbolised by a dot.