# Is the pentagon a regular polygon?

## Is the pentagon a regular polygon?

A pentagon is a polygon with five sides and five angles and can be either a regular or irregular polygon, depending on the measurements of its sides and angles.

What kind of polygon is pentagon?

Triangle (three-sided polygon) Quadrilateral (four-sided polygon) Pentagon (five-sided polygon) Hexagon (six-sided polygon)…

Triangle Heptagon
Octagon Square

### How many types of regular pentagon are there?

They are as follows: Regular Pentagon: A pentagon with equal sides and interior angles. Irregular Pentagon: A pentagon’s sides are not all equal, and the inner angles are not all the same size. Convex Pentagon: All of the interior angles are less than 180 degrees, and all of the vertices point outwards.

Is a pentagon an irregular polygon?

An irregular polygon does not have all its sides equal and not all the angles are equal in measure. Examples of irregular polygons are scalene triangle, right triangle, isosceles triangle, rectangle, parallelogram, irregular pentagon, irregular hexagon, etc.

## Which is a regular polygon?

A polygon is called regular if it has equal sides and angles. Thus, a regular triangle is an equilateral triangle, and a regular quadrilateral is a square.

What is the definition of regular pentagon?

The regular pentagon is the regular polygon with five sides, as illustrated above. A number of distance relationships between vertices of the regular pentagon can be derived by similar triangles in the above left figure, (1)

### Is pentagon a convex polygon?

A planar polygon is convex if it contains all the line segments connecting any pair of its points. Thus, for example, a regular pentagon is convex (left figure), while an indented pentagon is not (right figure).

Is a regular pentagon equilateral?

In contrast, the regular pentagon is unique, because it is equilateral and moreover it is equiangular (its five angles are equal; the measure is 108 degrees).

## What is regular and irregular polygons?

Polygons are figures with more than four straight sides. If the sides are all the same length the figures are said to be regular polygons, if they are not all the same length the figures are irregular polygons. A polygon with. 5 sides is a pentagon.

What is one angle in a regular pentagon?

108°
A regular pentagon has all its five sides equal and all five angles are also equal. Hence, the measure of each interior angle of a regular pentagon is given by the below formula. Measure of each interior angle = [(n – 2) × 180°]/n = 540°/5 = 108°.

### Is a regular pentagon concave or convex?

convex
A planar polygon is convex if it contains all the line segments connecting any pair of its points. Thus, for example, a regular pentagon is convex (left figure), while an indented pentagon is not (right figure). A planar polygon that is not convex is said to be a concave polygon.

Can a pentagon be concave?

Pentagons or other polygons can also be classified as either convex or concave. If all interior angles of a pentagon or polygon are less than 180°, it is convex. If one or more interior angles are larger than 180°, it is concave. A regular pentagon is always a convex pentagon.

## How many sides does a regular pentagon have?

five sides
The universal fact is that a pentagon has five sides, five corners, and five interior angles. It is a flat and enclosed shape, meaning no sides are curved and joined. If these sides and angles are equal, it is known as a regular pentagon.

What is the difference between a regular pentagon and an irregular pentagon?

Regular shapes have sides that are all equal and interior (inside) angles that are all equal. Irregular shapes have sides and angles of any length and size.

### How many angles are there in pentagon?

5 interior angles
There are 5 interior angles in a pentagon. Divide the total possible angle by 5 to determine the value of one interior angle. Each interior angle of a pentagon is 108 degrees.

What is regular and irregular polygon?

Polygons are figures with more than four straight sides. If the sides are all the same length the figures are said to be regular polygons, if they are not all the same length the figures are irregular polygons. A polygon with. 5 sides is a pentagon. 6 sides is a hexagon.

## What is the angle of regular pentagon?

Is a Pentagon a polygon?

Polygons are closed shapes with many sides that can be classified as a regular polygon, having equal sides and equal angles, or an irregular polygon, having different sides and angles. A pentagon is a polygon with five sides and five angles and can be either a regular or irregular polygon, depending on the measurements of its sides and angles.

### What are the interior angles of a regular pentagon?

A regular pentagon has five equal sides and all the interior angles of the pentagon are equal to 108⁰ All the sides and interior angles of a regular polygon are all equal. The bisectors of the interior angles of a regular polygon meet at its centre.

How does Cheyenne know a pentagon is a regular polygon?

If the angles and sides are the same, she knows a pentagon is a regular polygon. If they are different, then it is irregular. When Cheyenne measures all the angles of the yellow pentagon, she discovers that they all equal 108 degrees and all the sides equal 5 centimeters. So, in this case, this pentagon is a regular polygon.

## How many congruent sides does a regular pentagon have?

A regular pentagon must have five congruent sides, five congruent interior angles, and congruent exterior angles: five congruent sides (sides of equal length) five congruent interior angles (each measuring 108° 108 °) five congruent exterior angles of 72° 72 °