TRIANGLE-a polygon with a minimum of three sides is known as Triangle and it is also called a 3-gon. Trigons are polygons that have three sides. They are nothing but triangles.
QUADRILATERAL- a polygon with 4 sides. A diagonal of a quadrilat-eral is a line segment whose end points are opposite vertices of the quadrilateral.
The example, square, rectangle, parallelogram, rhombus, kite, trapezium, and isosceles trapezium are all categorized under quadrilaterals.
PENTAGON- a 2D polygon with five sides and five angles. “Penta” means “five”, and “gon” translates to “angles” in Greek, and hence when we combine both words “penta + gon”, we get the word “pentagon”.
HEXAGON- a closed two-dimensional polygon with six sides. Hexagon has 6 vertices and 6 angles also. Hexa means six and gonia means angles.
-a polygon of six angles and six sides
HEPTAGON- a two-dimensional shape with 7 sides and 7 angles. It belongs to the class of polygons in two-dimensional geometry. Polygons are closed shapes made up of straight lines and no curves. “Hepta” means seven and “gonia” means angle in the Greek language.
OCTAGON- is a polygon that has 8 sides and 8 angles. That means the number of vertices and edges of an octagon is 8, respectively. In simple words, the octagon is an 8-sided polygon, also called 8-gon, in a two-dimensional plane. A regular octagon will have all its sides equal in length.
-There are a total of 20 diagonals in it.
NONAGON- is a polygon made up of 9 sides and 9 angles. Nonagon = Nona + gon where Nona means nine and gon means sides.
-it is also called an Enneagon or 9-gon. In other words, a nonagon is a nine-sided closed two-dimensional figure.
DECAGON- is a polygon with ten sides, ten vertices, and ten angles.
-a decagon (from the Greek δέκα déka and γωνία gonía, "ten angles") is a ten-sided polygon or 10-gon. The total sum of the interior angles of a simple decagon is 1440°.
HENDECAGON- is an 11-sided shape with 11 corners. It is sometimes referred to as an 11-gon. In the 2D polygon family, it has one more corner/side than a decagon and one less corner/side than a dodecagon. This 11-sided shape is two-dimensional.
-A hendecagon is an 11-sided polygon, also variously known as an undecagon or unidecagon.
- The term "hendecagon" is preferable to the other two since it uses the Greek prefix and suffix instead of mixing a Roman prefix and Greek suffix.
DODECAGON- a 12-sided polygon is called a dodecagon. It also has twelve vertices and twelve interior angles.
-a dodecagon with vertices equally spaced around a circle and with all sides, the same length is regular polygon known as a regular dodecagon.
