- What’s the difference between a polygon and a regular polygon?
- How many sides does a regular polygon have if the exterior angle is 45?
- What is not a regular polygon?
- What is considered a regular polygon?
- How many regular polygons are there?
- What is the difference between a regular and not regular polygon?
- How do you know if a shape is not a polygon?
- What is the name of a 5 sided shape?
- What is the formula for a regular polygon?
- How many sides does a regular polygon have if the exterior angle is 30?
- What are the 20 kinds of polygons?
- What are the 12 kinds of polygons?

## What’s the difference between a polygon and a regular polygon?

A pentagon is a five sided polygon.

A polygon is a simple closed figure with at least three straight sides.

A regular polygon is a polygon with all sides the same length and all angles the same measure..

## How many sides does a regular polygon have if the exterior angle is 45?

8Sum of exterior angle of any polygon is 360o . As each exterior angle is 45o , number of angles or sides of the polygon is 360o45o=8 .

## What is not a regular polygon?

An irregular polygon is any polygon that is not a regular polygon. … It can have sides of any length and each interior angle can be any measure. They can be convex or concave, but all concave polygons are irregular since the interior angles cannot all be the same.

## What is considered a regular polygon?

In Euclidean geometry, a regular polygon is a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length). Regular polygons may be either convex or star.

## How many regular polygons are there?

Names of Regular PolygonsRegular PolygonNumber of SidesInterior AnglesEquilateral triangle3 sides3 interior angles of 60°Square4 sides4 interior angles of 90°Regular pentagon5 sides5 interior angles of 108°Regular hexagon6 sides6 interior angles of 120°2 more rows

## What is the difference between a regular and not regular polygon?

A polygon that does not have all sides equal and all angles equal. (A polygon is “regular” only when all angles are equal and all sides are equal, otherwise it is irregular.)

## How do you know if a shape is not a polygon?

A figure or shape is not considered a polygon if it has rounded sides or if its sides intersects at any place other than at the ends of each side. Therefore a circle is not a polygon and an hourglass shape is not a polygon.

## What is the name of a 5 sided shape?

pentagonMore than Four Sides A five-sided shape is called a pentagon. A six-sided shape is a hexagon, a seven-sided shape a heptagon, while an octagon has eight sides…

## What is the formula for a regular polygon?

You also learned the formula for finding the area of any regular polygon if you know the length of one side and the apothem: A = (n × s × a)2 A = ( n × s × a ) 2 , where n is the number of sides, s is the length of one side, and a is the apothem.

## How many sides does a regular polygon have if the exterior angle is 30?

12Explanation: Sum of exterior angles of every polygon irrespective of number of its sides is 360o . As it is a regular polygon, all exterior angles are equal and are 30o . Hence number of sides of the polygon is 360o30o=12 .

## What are the 20 kinds of polygons?

Terms in this set (18)Three. Trigon or Triangle.Four. Tetragon or Quadrilateral.Five. Pentagon.Six. Hexagon.Seven. Heptagon.Eight. Octagon.Nine. Nonagon or Enneagon.Ten. Decagon.More items…

## What are the 12 kinds of polygons?

There are many types of polygons….Types of polygons.Number of sidesName of polygon8octagon9nonagon10decagon12dodecagon5 more rows