# Question: What Is The Size Of The Interior Angle Of A Regular 20 Sided Polygon?

## What is the name of a 21 sided polygon?

What is the name of a polygon with…?#Name of the Polygon + Geometric Drawing18 sidesoctadecagon19 sidesenneadecagon20 sidesicosagon21 sideshenicosagon53 more rows.

## What are the 20 kinds of polygons?

Terms in this set (18)Three. Trigon or Triangle.Four. Tetragon or Quadrilateral.Five. Pentagon.Six. Hexagon.Seven. Heptagon.Eight. Octagon.Nine. Nonagon or Enneagon.Ten. Decagon.More items…

## How do you solve for interior angles?

The formula for finding the sum of the measure of the interior angles is (n – 2) * 180. To find the measure of one interior angle, we take that formula and divide by the number of sides n: (n – 2) * 180 / n.

## What is a 100 sided shape?

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.

## How do you find the size of an interior angle in a regular polygon?

All the interior angles in a regular polygon are equal. The formula for calculating the size of an interior angle is: interior angle of a polygon = sum of interior angles ÷ number of sides. The sum of exterior angles of a polygon is 360°.

## How many sides does a polygon have if the sum of the interior angles is 1620?

11 sidesAnswer and Explanation: So the polygon has 11 sides.

## What is a 20 sided polygon 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 25 sided polygon called?

Systematic polygon namesOnesTwenties4tetra-245penta-256hexa-267hepta-276 more rows

## What is the measure of the interior angles of a 25 Gon?

That’s the same as 2 times 180, which is why Mark took two from the N and THEN multiplied by 180. So: you can just remember N triangles minus circle, or sides minus 2 times 180. It makes a lot more sense with a polished drawing… (25 – 2)180° = ?

## What is a 1000000 sided shape called?

megagonA megagon or 1 000 000-gon is a polygon with 1 million sides (mega-, from the Greek μέγας megas, meaning “great”).

## What do you call a 7 sided shape?

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.

## What’s a 13 sided shape called?

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

## What is a 30 sided polygon called?

triacontagonIn geometry, a triacontagon or 30-gon is a thirty-sided polygon. The sum of any triacontagon’s interior angles is 5040 degrees.

## What is the size of an interior angle of a regular 24 sided polygon?

To find the measure of an interior angle of a regular polygon, take the sum of all interior angles and divide by the number of angles. The sum of all interior angles can be found by (n – 2)*180 where n is the number of sides, in this case 24. So all the interior angles add to 3960 degrees.

## What is the interior angle of a regular 25 sided polygon?

172.8°The sum of any pentacontagon’s interior angles is 8640 degrees….Pentacontagon.Regular pentacontagonSchläfli symbol{50}, t{25}Coxeter diagramSymmetry groupDihedral (D50), order 2×50Internal angle (degrees)172.8°5 more rows

## 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.