# Question: Is A Heptagon A Regular Polygon?

## 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 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.

## Is Heptagon same as septagon?

A heptagon is a seven-sided polygon. It is also sometimes called a septagon, though this usage mixes a Latin prefix sept- (derived from septua-, meaning “seven”) with the Greek suffix -gon (from gonia, meaning “angle”), and is therefore not recommended.

## What is a 100 sided shape called?

hectogonIn geometry, a hectogon or hecatontagon or 100-gon is a hundred-sided polygon. The sum of all hectogon’s interior angles are 17640 degrees.

## What is a 14 sided shape called?

tetradecagonIn geometry, a tetradecagon or tetrakaidecagon or 14-gon is a fourteen-sided polygon.

## What is a 7 sided polygon called?

heptagonA six-sided shape is a hexagon, a seven-sided shape a heptagon, while an octagon has eight sides… The names of polygons are derived from the prefixes of ancient Greek numbers. The Greek numerical prefix occurs in many names of everyday objects and concepts.

## What’s a 12 sided shape called?

dodecagonIn geometry, a dodecagon or 12-gon is any twelve-sided polygon.

## Is a Heptagon a polygon?

In geometry, a heptagon is a seven-sided polygon or 7-gon. The heptagon is sometimes referred to as the septagon, using “sept-” (an elision of septua-, a Latin-derived numerical prefix, rather than hepta-, a Greek-derived numerical prefix; both are cognate) together with the Greek suffix “-agon” meaning angle.

## What is a 10 sided shape called?

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°.

## How many triangles are in a Heptagon?

five trianglesAnswer and Explanation: There are five triangles in a heptagon. A heptagon is a seven-sided polygon. In general, if a polygon has n sides, then we have the following formula…

## 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.

## What is a 21 sided polygon called?

IcosikaihenagonA polygon with 21 sides is therefore called a: Icosikaihenagon, but also a Icosihenagon.

## Is a hexagon a regular polygon?

In geometry, a hexagon (from Greek ἕξ hex, “six” and γωνία, gonía, “corner, angle”) is a six-sided polygon or 6-gon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°….Hexagon.Regular hexagonA regular hexagonTypeRegular polygonEdges and vertices6Schläfli symbol{6}, t{3}5 more rows

## 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 an L shape called?

palordrolap. 6 points · 1 year ago. Yes, it’s a hexagon, specifically a non-convex hexagon on account of having a concave angle. There’s no specific official name that I’m aware of. “L-shaped hexagon” might actually be sufficient.

## What’s a 13 sided shape called?

tridecagonIn geometry, a tridecagon or triskaidecagon or 13-gon is a thirteen-sided polygon.

## What is a 25 sided shape called?

pentacosagonlinenumber of sidesname of polygon23icosikaitrigon or tricosagon24icosikaitetragon or tetracosagon25icosikaipentagon or pentacosagon26icosikaihexagon or hexacosagon38 more rows•Apr 6, 2006