 # Quick Answer: How Many Sides Does A 7 Sided Polygon Have?

## How many diagonals does a 7 sided polygon have?

Classifying PolygonsPolygon NameNumber of SidesNumber of DiagonalsPentagon55Hexagon69Heptagon714Octagon8?7 more rows•Jul 18, 2012.

## How many degrees does a 7 sided polygon have?

900 degreesA heptagon has 7 sides, so we take the hexagon’s sum of interior angles and add 180 to it getting us, 720+180=900 degrees.

## What is a 99 sided shape called?

EnneacontagonIn geometry, an enneacontagon or enenecontagon or 90-gon (from Ancient Greek ἑννενήκοντα, ninety) is a ninety-sided polygon.

## 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°.

## How many diagonals does a 13 gon have?

65 diagonalsHow many diagonals does a 13-gon have? n(n-3)/2 is the number of diagonals. Explain in words why this works. A 13-gon would have 13(13-3)/2 = 65 diagonals.

## How many sides does a regular polygon have?

Names of Regular PolygonsRegular PolygonNumber of SidesExterior AnglesEquilateral triangle3 sides3 exterior angles of 120°Square4 sides4 exterior angles of 90°Regular pentagon5 sides5 exterior angles of 72°Regular hexagon6 sides6 exterior angles of 60°2 more rows

## Why is it called a Heptagon?

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 shape with 7 sides called?

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… Polygon Names. 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.

## How many diagonals does a 9 sided polygon have?

PolygonsSidesDiagonals71482092710354 more rows

## What is a 12 sided shape called?

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

## How many degrees is a hexagon?

720°Hexagon/Sum of interior angles

## What is a regular polygon with 7 sides?

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.