# Question: Does An Octagon Have To Have Equal Sides?

## What do you call the polygons with equal sides?

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)..

## Does a polygon have to have equal sides?

A regular polygon has equal length sides with equal angles between each side. Any other polygon is an irregular polygon, which by definition has unequal length sides and unequal angles between sides. Circles and shapes that include curves are not polygons – a polygon, by definition, is made up of straight lines.

## Can a regular octagon be concave?

The octagon which has all its angles pointing outside or no angles are pointing inwards, is a convex octagon. The angles of the convex octagon are not more than 180°. And the octagon, which one of its angles pointing inward is a concave-shaped octagon.

## Why can’t a triangle be concave?

A concave polygon is defined as a polygon with one or more interior angles greater than 180°. It looks sort of like a vertex has been ‘pushed in’ towards the inside of the polygon. Note that a triangle (3-gon) can never be concave. A concave polygon is the opposite of a convex polygon.

## What is a concave octagon?

Concave or Convex A convex octagon has no angles pointing inwards. More precisely, no internal angles can be more than 180°. When any internal angle is greater than 180° it is concave. (

## What is a real life example of a pentagon?

Examples of Pentagons The famous U.S. department of defense building in Washington D.C. (The Pentagon building) The home plate on a baseball field. School crossing signs. Sections on a soccer ball.

## Is an octagon any shape with 8 sides?

In geometry, an octagon (from the Greek ὀκτάγωνον oktágōnon, “eight angles”) is an eight-sided polygon or 8-gon. A regular octagon has Schläfli symbol {8} and can also be constructed as a quasiregular truncated square, t{4}, which alternates two types of edges.

## What things are shaped like an octagon?

Many items you may use for home decor, such as lampshades, mirrors, frames and candles, can be octagonal in shape. If you have tiled floors or walls in your home, their design may include octagonal tiles; some houses also have octagonal windows.

## What is a 10 sided shape?

decagonIn geometry, 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°.

## Can a polygon have 2 sides?

In geometry, a digon is a polygon with two sides (edges) and two vertices. … A regular digon has both angles equal and both sides equal and is represented by Schläfli symbol {2}. It may be constructed on a sphere as a pair of 180 degree arcs connecting antipodal points, when it forms a lune.

## What does an octagon symbolize?

The octagon is found in baptisteries as a symbol representing eternal life as – likely because the number eight is symbolic of renewal. … The circle is symbolic of the heavens (also eternity/infinity) and the angularity of the square is symbolic of earthly presence.

## What is a 33 sided shape called?

tritriacontagonWhat is the name of a polygon with…?#Name of the Polygon + Geometric Drawing33 sidestritriacontagon34 sidestetratriacontagon35 sidespentatriacontagon36 sideshexatriacontagon53 more rows

## What is a 1 sided shape called?

henagon monogonList of n-gons by Greek numerical prefixesSidesNames1henagonmonogon2digonbigon3trigontriangle4tetragonquadrilateral7 more rows

## What’s a 20 sided shape called?

icosagonIn geometry, an icosagon or 20-gon is a twenty-sided polygon. The sum of any icosagon’s interior angles is 3240 degrees.

## How many sides does an octagon have?

8Octagon/Number of edges

## What is a 9 sided shape called?

enneagonIn geometry, a nonagon (/ˈnɒnəɡɒn/) or enneagon (/ˈɛniəɡɒn/) is a nine-sided polygon or 9-gon. The name nonagon is a prefix hybrid formation, from Latin (nonus, “ninth” + gonon), used equivalently, attested already in the 16th century in French nonogone and in English from the 17th century.

## What is a real life example of a hexagon?

The shapes that make up a honeycomb, a nut, and bolts are all examples of real life objects in the shape of hexagon. some floor tiles and paving stones.

## What things are shaped like a hexagon?

When you think of hexagons all around us, the most relatable objects that use a hexagonal shape are nuts and bolt heads. Hexagon is the predominantly used shape for nuts and bolts because of its unique features.