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a nonagon
Regular pentagon
A regular polygon that has 180 degrees is an equilateral triangle.
3
hexagon
A regular Undegon (11 sided polygon) has 11 lines of symmetry. It also has an order of rotation symmetry of 11.
Yes, because if a regular polygon is turned around a specific point (the angle of rotation) and matches up again, it has rotation symmetry. For example, a hexagon is a regular polygon with six sides. All sides are the same length and the same size. When you turn it around the angle of rotation, it matches with the next side. Therefore, all regular polygons have rotational symmetry. Hope this helps!
a nonagon
The angle of rotation for a regular polygon with 7 sides isImmersive Reader
an Octagon, because 360/8=45.
360/15 = 24 degrees.
a pentagon has rotational symmetry if its a regular pentagon. if you add all 5 sides together you will get 360 degrees
Number of lines of symmetry = Number of sides of the regular polygon
If you mean a polygon with equal exterior angles of 18 degrees then it will have 360/18 = 20 sides.
If you rotate a 20-sided regular polygon by 360/20 degrees, the result will look the same as the original polygon. Any additional rotation will be a multiple of this number.
All of them have rotational symmetry because all the sides and angles have to be the same in order for the polygon to be a regular polygon
Regular polygon Equilateral polygon Polygon with rotational symmetry