360/9 = 40 degrees
Any shape can have an exterior angle of 45 degrees. If you are talking about exterior angle sum, it is always 360 degrees for any polygon. If you are talking about a regular polygon (equal exterior angles), it would be 360/45=8 sides. Therefore, a regular octagon has exterior angles of 45 degrees.
Pentagon A+
It is a regular 10 sided decagon
A regular nonagon.
If the interior angle is 150° then the exterior angle measures 180 -150 = 30°. The sum of the exterior angles of a regular or convex polygon = 360° The number of sides is therefore 360/30 = 12 sides The shape is a dodecagon.
A nine sided shape that is called a regular nonagon.
Any shape can have an exterior angle of 45 degrees. If you are talking about exterior angle sum, it is always 360 degrees for any polygon. If you are talking about a regular polygon (equal exterior angles), it would be 360/45=8 sides. Therefore, a regular octagon has exterior angles of 45 degrees.
A nine sided nonagon is only a regular shape if it has 9 equal sides
Each interior angle of a regular 9 sided shape measures 140 degrees
It is a plane area in the shape of a nonagon!
Exterior angle = 360/20=18 interior angle = 180 - 18 = 162 Must be regular shape
square
Pentagon A+
Exterior angle = 14.4 degrees Interior angle = 165.6 degrees
It is a regular 10 sided decagon
If the exterior angle is 30o then the shape has 360/30 = 12 sides. An interior angle = 180 - exterior angle = 180 - 30 = 150. Since the shape has 12 sides the interior angles sum to 150 x 12 = 1800o.
If it's regular then 360/20 = 18 degrees