Class 6 Maths Basic Geometrical Ideas | Polygons |

__Polygons__

A polygon is a closed figure bounded by three or more line segments that intersect exactly to form a closed curve.

Some examples of polygon,

__Basic Terms in Polygons__

**Sides:**The line segments that forms a polygon is termed as sides. From the above polygon, we can say that line segment AB, BC, CD, DA are four sides of the polygon.**Vertex:**The meeting of two sides is termed as vertex. From the above polygon, we can say that A is a vertex as DA and AB meets at A. Similarly, B, C and D are also vertices of the polygon.**Adjacent Sides:**In a polygon, any two sides that has a common end are termed as adjacent sides. From the above polygon, we can say that sides CD and BC are adjacent as they terminate at a common end C. Similarly, sides AB and DA, AB and BC, CD and DA are also adjacent.**Adjacent Vertices:**End points of the same side of the polygon are termed as adjacent vertex. From the above polygon, we can say that C and D are adjacent vertices while A and C are not adjacent vertices.**Diagonals:**The line joining the non-adjacent vertices of a polygon is termed as diagonals. From the above polygon, we can say that line segment AC and DB are the diagonals of the polygon.

**Question:** Illustrate, if possible, each one of the following with a diagram: A closed curve that is not a polygon, A polygon with two side

__Solution:__

A closed curve that is not a polygon

A polygon with two side : A polygon with two sides are not possible; as a polygon is a closed figure so minimum three sides are required to form close diagram.

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