Improved Answer:
360+540+1080 = 1980 degrees
Square = 360 Pentagon = 540 Octagon = 1080
Octagon.
All of them have, except the pentagon and octagon.
All the angles of a square must be 90 degrees. A pentagon can have angles of any size except that, since they must sum to 540 degrees, one of them, at least must be greater than 90 degrees.
Of the four shapes mentioned, the octagon has the most sides. Square has 4 sides, hexagon has 6, pentagon has 5, and the octagon has 8.
equal sides
Square have four equal angles and pentagon have 5 angles
Each vertex angle of a polygon is composed of an external angle and an interior angle. These two angles are supplementary (total 180°). As the number of sides of a regular polygon increases then the external angle decreases and conversely, the interior angle increases. The interior angle of a regular pentagon (108°) is larger than the interior angle of a square (90°).
A square.
Different polygons have different angles, so unless you can give a more descriptive question, I'm going to have to leave you with the interior angles of a few shapes. a square has 360 degrees in its interior angles a triangle has 180 degrees in its interior angles a pentagon has 540 degrees in its interior angles More can be found at the site I linked.
As an octagon has 8 angles, a square has 4 as has a rectangle
Only when the polygon is a regular convex polygon. Such as an equilateral triangle, or a square, or a regular pentagon.