# How many sides does a Heptadecagon?

## How many sides does a Heptadecagon?

17 sides
This document presents Gauss’s insight that it is possible to construct a heptadecagon— a regular polygon with 17 sides—with straightedge and compass.

What is a regular 19 Gon?

Type Regular polygon
Edges and vertices 19
Schläfli symbol {19}

What is a regular 9 sided shape?

In 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 regular polygon of 7 sides called?

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 do you call a 17 sided shape?

The regular polygon of 17 sides is called the heptadecagon, or sometimes the heptakaidecagon. Gauss proved in 1796 (when he was 19 years old) that the heptadecagon is constructible with a compass and straightedge.

What is another name for regular shape?

Examples of Regular Shapes

Shape Name Properties
Regular pentagon 5 equal sides; 5 equal angles
Regular hexagon 6 equal sides; 6 equal angles
Regular heptagon 7 equal sides; 7 equal angles
Regular octagon 8 equal sides; 8 equal angles

#### What is a five-sided shape?

pentagon
In geometry, a pentagon (from the Greek πέντε pente meaning five and γωνία gonia meaning angle) is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°. A pentagon may be simple or self-intersecting. A self-intersecting regular pentagon (or star pentagon) is called a pentagram.

What are the properties of a regular heptadecagon?

Regular heptadecagon Symmetry group Dihedral (D 17 ), order 2×17 Internal angle ( degrees) ≈158.82° Dual polygon Self Properties Convex, cyclic, equilateral, isogonal, i

What is the symbol for the heptadecagon Prime?

A regular heptadecagon is represented by the Schläfli symbol {17}. As 17 is a Fermat prime, the regular heptadecagon is a constructible polygon (that is, one that can be constructed using a compass and unmarked straightedge ): this was shown by Carl Friedrich Gauss in 1796 at the age of 19.

## Is the heptadecagon represented by a Schlafli symbol?

Regular heptadecagon. A regular heptadecagon is represented by the Schläfli symbol {17}. As 17 is a Fermat prime, the regular heptadecagon is a constructible polygon (that is, one that can be constructed using a compass and unmarked straightedge): this was shown by Carl Friedrich Gauss in 1796 at the age of 19.