In 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°.

Also, What is a octagon used for?

An octagon is a geometrical shape that contains eight sides and eight angles. Octagons must have straight sides that connect; they cannot be curved or disconnected. You will often see octagons in real life in the shape of a stop sign. At one time, you could also see octagons used in architecture.

Hereof, What is a 1000000000000000 sided shape called?

1000000000000000 sided shape are often used in geometry, an octadecagon ( or octakaidecagon ) 11-gon.

Also to know What is a 99 sided shape called? What is a 99 sided shape called? pentagon (5-gon), dodecagon (12-gon) or icosagon (20-gon) — with the triangle, quadrilateral and nonagon (9-gon) being notable exceptions. 8 sided shape are often used in geometry, architecture, and even road signs.

What is a 19 sided shape called?

In geometry, an enneadecagon, enneakaidecagon, nonadecagon or 19-gon is a polygon with nineteen sides.

18 Related Questions Answers Found

What does an octagon symbolize?

Occasionally, the octagon was viewed as a symbol for infinity. It was suggested that the octagon is a circle attempting to become a square, and a square attempting to become a circle. … The octagon and the star octagram were religious symbols for rebirth and resurrection.

Does an octagon have 8 equal sides?

The octagon having eight congruent sides and angles is known as a regular octagon. Every regular octagon has the same angle measures. All sides are equal in length, and all the angles are equal in measure. The interior angles add up to 1080°(135×8) and the exterior angles add up to 360°.

What is the inside angle of an octagon?

The sum of the measures of the interior angles of an octagon =(8−2)180° . The sum of the measures of the interior angles of an octagon is 1080° .

What is the biggest sided shape?


Regular myriagon
Type Regular polygon
Edges and vertices 10000
Schläfli symbol {10000}, t{5000}, tt{2500}, ttt{1250}, tttt{625}
Coxeter diagram

What is a 56 sided shape called?

A polygon of 12 sides is called a dodecagon. NOTE: There are many more polygons, but the ones listed here are some of the most popular and most often taught in geometry classes. Polygons with more than 12 sides are usually referred to as n-gons. As in, a polygon with 56 sides is a 56-gon.

What’s the biggest shape?

References U


, C


, W

Properties Semiregular convex
Colored faces (Vertex figure)
Deltoidal hexecontahedron (dual polyhedron) Net

What do you call a 69 sided shape?

In geometry, an apeirogon (from the Greek words “ἄπειρος” apeiros: “infinite, boundless”, and “γωνία” gonia: “angle”) or infinite polygon is a generalized polygon with a countably infinite number of sides.

What is a 1 trillion sided shape called?


Regular megagon
Symmetry group Dihedral (D


), order 2×1000000
Internal angle (degrees) 179.99964°
Dual polygon Self
Properties Convex, cyclic, equilateral, isogonal, isotoxal

What is a 28 sided shape called?

In geometry, an icosioctagon (or icosikaioctagon) or 28-gon is a twenty eight sided polygon. The sum of any icosioctagon’s interior angles is 4680 degrees.

What are 7 9 and 10 sided shapes called?

2D Shapes

Triangle – 3 Sides Square – 4 Sides
Pentagon – 5 Sides Hexagon – 6 sides
Heptagon – 7 Sides Octagon – 8 Sides


– 9 Sides
Decagon – 10 Sides
More …

Is octagon a lucky shape?

In BTB Feng Shui (Bon Buddhism), the octagon is seen as a symbol of protection to ward off negative spiritual activity. … The octagon is also seen as a vehicle for the advent of good health and good fortune. Referring to the Western Bagua Map, you’ll see that too is in the shape of an octagon.

Are octagons good luck?

In feng shui, the octagon protects one’s being and is a shape that draws in good fortune and positive energy from all (eight) directions. In this way, the octagon has been used and revered by people as a special shape representing good fortune and eternity.

Are hexagons 6 sides?

In geometry, a hexagon (from Greek ἕξ, hex, meaning “six”, and γωνία, gonía, meaning “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°.

Can an octagon have curved sides?

Octagon is a polygon in geometry, which has 8 sides and 8 angles. … These sides are in a straight line form; they are not curved or disjoint with each other. Each interior angle of a regular octagon is 135°.

How many degrees is a 6 sided shape?

A hexagon has six sides, and we can use the formula degrees = (# of sides – 2) * 180. Then degrees = (6 – 2) * 180 = 720 degrees. Each angle is 720/6 = 120 degrees.

How many right angles does a octagon have?

So an octagon can have 6 right angles. Sum of angles = 1260′. 8 right angles = 720′, leaving 540′. 7 right angles = 630′, leaving 630′.

What is the newest shape?

The scientists named the shape “scutoid” after a triangle-shaped part of a beetle’s thorax called the scutellum. The scutoid itself looks like a bent prism with five slightly slanted sides and one corner cut off.

What is the smallest shape?

Answer: Probably, the smallest shape in geometry is a circle.

Is any 3 sided polygon a triangle?

A three-sided polygon is a triangle.