all decagons have 1440 degrees
That depends on how many sides the polygon has
A square is a quadrilateral so it has 360 degrees.
Irregular
There are 540 interior degrees inside a regular or an irregular 5 sided pentagon.
A square is not an irregular shape and conversely. So the square of an irregular shape cannot exist.A square is not an irregular shape and conversely. So the square of an irregular shape cannot exist.A square is not an irregular shape and conversely. So the square of an irregular shape cannot exist.A square is not an irregular shape and conversely. So the square of an irregular shape cannot exist.
A square cannot be irregular though it is a polygon.
720 degrees
A square adds up to 360 degrees
360 degrees
A square is a regular shape. It will have four sides of equal length, and a right angle (90 degrees) in each corner.
A rectangle is irregular. The only regular rectangle is a square, so any rectangle that is NOT a square is irregular.
90 degrees
An irregular pentagon would have the same number of degrees (collective angle degrees) as a regular pentagon. (But, honestly, I don't know the number of degrees in a pentagon right off the top of my head.) Just like how all triangles have a total of 180 degrees and all quadrilaterals have a total of 360 degrees.
The 4 equal angles of 90 degrees within a square add up to 360 degrees
A right angled triangle, A square, rectangle, a right trapezium, Selected versions of irregular polygons with 5 or more sides.
360