 Let's learn about polygons. So what is a polygon? The word poly means many and gons means angles. So a shape which has many angles is known as a polygon but what is a proper definition? Let's see what is a polygon and what is not a polygon? There are two things that need to be followed by a polygon. It has to have straight sides like this. So anything which has a curve as a side is not a polygon and also the polygon need to be a closed figure. It cannot be open. An example of an open figure is something like this. It doesn't end exactly where it started. So you take any point on a polygon, it starts there and it ends there with the straight sides but this is an open figure and this is also not a polygon. So you already know about few polygons. One of them is a triangle, a triangle which has three sides. So all the polygons with three sides are known as triangles. Then you also know about a quadrilateral like this which has four sides. So this is known as a quadrilateral, quadrilateral, quad means four. It has four sides or four angles. If you draw a shape with five straight sides, then this will be a pentagon which has five sides. Then you can also draw a hexagon which is known as hexagon and hexa means six. So it has six sides or six angles. Similarly, the shape having eight sides or eight angles is known as an octagon. So this is an octagon having eight sides and this is how we classify different polygons depending upon how many sides they have. Do we see these shapes in real life? Let's see. There are many opportunities to spot three sided polygon which is a triangle. So here you see the triangles with three different sides. So these are flags which is one of the examples of a triangle. You also see quadrilaterals as well. Quadrilaterals have four sides like this. So the screen of your laptop has four sides, your mobile might have four sides. So this is a quadrilateral and an exercise for you to find more triangles and quadrilaterals around you. Let us look at an example of a pentagon. Now you see here a logo which has five sides. One, two, three, four and five and the five sided polygon is known as a pentagon. Can you find more shapes which include pentagon as a shape? I can show you another shape which you will love seeing. pentagon as well as pentagon and that's a football like you can see here. See this white shape and it's a hexagon right has six sides and a black one is a pentagon. So in football you can spot both hexagon and pentagon. Also have you ever seen this top sign? This top sign has eight sides one, two, three, four, five, six, seven and eight. So that's an octagon having eight sides. Think about if you can find more such shapes around you and comment down below.