Pentagon.
Regular shapes:all sides and angles are the same Irregular shapes: different angle and sides
No, right triangles do not.
pentagon
Octagon, dodecagon, myriagon.
An angle must have 2 sides or it is no longer an angle.
Angle
Regular shapes:all sides and angles are the same Irregular shapes: different angle and sides
It is a point where two sides of the shape meet.
Angle
No, right triangles do not.
dick
Polygons
An obtuse angle is an angle that is greater than 90 degrees but less than 180 degrees. The internal angles of any regular polygon with 5 or more sides will be obtuse.
A pentagon
a square
Pentagons have 5 sides and they can be regular or irregular
A polygon with any number of sides can have a 156 degree angle, as can most non-polygonal plane shapes.