  # Septagon vs. Heptagon: What's the Difference? Edited by Sumera Saeed || By Sawaira Riaz || Updated on September 28, 2023
A septagon and a heptagon are synonymous geometric terms, both referring to a polygon with seven sides and seven angles. ## Key Differences

A septagon and a heptagon are identical geometric figures, each characterized by having seven straight sides and seven angles. The terms "septagon" and "heptagon" are interchangeable, with "septagon" derived from the Latin word "septem," meaning seven, and "heptagon" from the Greek word "hepta," also meaning seven. While they represent the same shape, the distinction in naming stems from the differing origins of the words.
Despite having different names, a septagon and a heptagon have the same geometric properties and characteristics. Both polygons are classified as heptagons and can be regular or irregular. A regular septagon or heptagon has all its sides and angles equal, whereas an irregular one does not have equal sides and angles. Regardless of the nomenclature, the geometric principles applicable to a septagon are equally applicable to a heptagon.
Septagon and heptagon are versatile terms used in various mathematical and real-world contexts to describe seven-sided polygons. The choice between the terms depends on individual preference or contextual appropriateness, and they are used interchangeably in mathematical geometry to study the properties, dimensions, and other attributes of seven-sided polygons. Both terms are integral to geometry, enabling a more profound understanding of polygonal structures and their applications.
In the realm of geometry, the exploration of septagons and heptagons involves analyzing their angles, sides, and symmetries. Whether one chooses to use "septagon" or "heptagon," the exploration of their properties remains a consistent and uniform study. The existence of different terms for the same concept showcases the richness of mathematical language and its evolution over time, incorporating words from different languages and cultures.

## Comparison Chart

### Definition

A polygon with seven sides and seven angles.
A polygon with seven sides and seven angles.

### Origin of Word

Latin: “septem” meaning seven.
Greek: “hepta” meaning seven.

### Regular Form

Has equal sides and angles.
Has equal sides and angles.

### Irregular Form

Does not have equal sides and angles.
Does not have equal sides and angles.

### Usage

Interchangeable with heptagon.
Interchangeable with septagon.

## Septagon and Heptagon Definitions

#### Septagon

A seven-sided figure that can be regular or irregular.
The septagon in the diagram has seven equal sides and angles.

#### Heptagon

A seven-sided polygon, either regular or irregular.
The crystal had the form of an irregular heptagon.

#### Septagon

A closed, flat shape with seven vertices.
A septagon has seven vertices and seven internal angles.

#### Heptagon

A closed plane figure with seven edges and vertices.
Each internal angle of a regular heptagon measures approximately 128.57 degrees.

#### Septagon

A seven-edged polygon used in geometry.
In a regular septagon, each internal angle is approximately 128.57 degrees.

#### Heptagon

A geometric figure with seven straight sides and seven angles.
He drew a regular heptagon with each angle measuring about 128.57 degrees.

#### Septagon

A polygon consisting of seven angles and seven sides.
The logo was in the shape of a perfect septagon.

#### Heptagon

A polygon characterized by having seven corners and seven sides.
The diagram shows a heptagon divided into seven congruent triangles.

#### Septagon

A geometric figure with seven straight, connected sides.
He drew a septagon on the board to illustrate his point.

#### Heptagon

A flat, seven-sided shape used in the study of geometry.
The geometry lesson today focused on the properties of a heptagon.

#### Septagon

(proscribed) A polygon with seven sides and seven angles.

#### Heptagon

A polygon with seven sides and seven angles.

#### Heptagon

(geometry) A polygon with seven sides and seven angles.

#### Heptagon

A plane figure consisting of seven sides and having seven angles.

#### Heptagon

A seven-sided polygon

## FAQs

#### Can a septagon have unequal sides?

Yes, if a septagon is irregular, it can have unequal sides, just like an irregular heptagon.

#### Do septagon and heptagon have the same number of vertices?

Yes, both septagon and heptagon have seven vertices.

#### Why does septagon have a Latin origin and heptagon a Greek origin?

The word septagon has a Latin prefix due to Latin influences, while heptagon uses a Greek prefix reflecting Greek influences on mathematical terminology.

#### Are septagon and heptagon the same?

Yes, septagon and heptagon refer to the same geometric shape, a seven-sided polygon.

#### Can a regular septagon have unequal angles?

No, a regular septagon, like a regular heptagon, has equal angles and sides.

#### Is the term septagon more commonly used than heptagon?

The usage depends on individual preference or contextual appropriateness; there is no universally more common term.

#### Is the sum of the internal angles the same in both septagon and heptagon?

Yes, the sum of the internal angles is the same for both, totaling 900 degrees.

#### Are the properties of an irregular septagon and heptagon the same?

Yes, since they refer to the same geometric shape, an irregular septagon and an irregular heptagon share properties.

#### Can septagon and heptagon be seen in nature?

While not as common as other shapes, septagons and heptagons can occasionally be observed in natural formations.

#### Can the terms septagon and heptagon be used interchangeably in geometry?

Absolutely, septagon and heptagon can be used interchangeably as they represent the same geometric figure.

#### Do both septagon and heptagon have variants?

Yes, both can be regular or irregular, referring to the equality of their sides and angles.

#### Is the area of a regular septagon the same as that of a regular heptagon with equal sides?

Yes, the area of a regular septagon is equivalent to that of a regular heptagon if their sides are equal.

#### Which term, septagon or heptagon, is more accurate for a seven-sided polygon?

Both terms are accurate and acceptable; the choice depends on preference and context.

#### Are septagon and heptagon used in real-world applications?

Yes, both are used in various real-world contexts, such as design and architecture, reflecting seven-sided shapes.

#### Is the external angle of a regular septagon equal to that of a regular heptagon?

Yes, since they are the same shape, the external angles of a regular septagon and heptagon are equal, each measuring about 51.43 degrees.  