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.

What is the size of an interior angle of a regular 18 sided polygon?

Regular PolygonsSidesNameInterior Angles18Octdecagon160.00°19Enneadecagon161.05°20Icosagon162.00°30Triacontagon168.00°25 more rows

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.

What is an 18 sided shape?

OctadecagonOctadecagon. An 18-sided polygon, sometimes also called an octakaidecagon.

What is the measure of an interior angle of a regular 22 Gon?

In geometry, an icosidigon (or icosikaidigon) or 22-gon is a twenty-two-sided polygon. The sum of any icosidigon’s interior angles is 3600 degrees.

What is a 19 sided shape called?

EnneadecagonIn geometry an enneadecagon or enneakaidecagon or 19-gon is a nineteen-sided polygon.

What is the formula for interior angles?

You can use the same formula, S = (n − 2) × 180° S = ( n – 2 ) × 180 ° , to find out how many sides n a polygon has, if you know the value of S , the sum of interior angles.