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2D Polygon forms

Enjoy learning about 2D polygon forms with our selection of amazing facts. Find information about triangles, squares, pentagons, hexagons, heptagons, octagons, nonagons, decagons and more. See what they look like, how numerous sides castle have and also learn part cool trivia.

You are watching: What is the difference between a hexagon and an octagon

Read on and also enjoy every our 2D polygon facts as well as all our other amazing information specialized to the wonderful civilization of geometry.


A polygon is a airplane (2 dimensional) number that attributes at least 3 right sides and angles.

A regular polygon has actually sides which are all the very same length and angles which room all the same. Examples of consistent polygons incorporate the equilateral triangle and also square.

A pentagon is a 5 face polygon with inner angles that add to 540 degrees.

Regular pentagons have actually sides of equal length and also interior angles of 108 degrees.

The united state Department of Defense headquarters is named "the Pentagon" .

The edible tree okra is shaped like a pentagon.

A hexagon is a 6 sided polygon with interior angles that add to 720 degrees.

Regular hexagons have sides of equal length and interior angle of 120 degrees.

Beehive cells space hexagonal.

A heptagon is a 7 sided polygon with inner angles that add to 900 degrees.

Regular heptagons have sides of same length and interior angles of 128.57 degrees.

The british 50 and 20 pence coins room curved heptagons.

An octagon is an 8 face polygon with inner angles that add to 1080 degrees.

Regular octagons have actually sides of equal length and also interior angles of 135 degrees.

A nonagon is a 9 sided polygon with internal angles that add to 1260 degrees.

Regular nonagons have sides of equal length and also interior angles of 140 degrees.

A decagon is a 10 sided polygon with internal angles that include to 1440 degrees.

Regular decagons have sides of equal length and interior angle of 144 degrees.

An pentadecagon is a 15 face polygon with internal angles that include to 2340 degrees.

See more: Eli5: Why Does Pi Go On Forever ? Repeating Decimal

An icosagon is a 20 sided polygon with interior angles that add to 3240 degrees.