Any concave polygon. It must have at least 4 sides.
chevron
A concave pentagon.
An arrowhead
A reflex angle
A reflex angle is one greater than 180o
chevron
It can, but does not have to.
No. For a start, a circle has no angles. No regular polygon has a reflex angle.
a chevron by . ekam
A concave pentagon.
An arrowhead
A reflex angle
parallelogram!
A reflex angle is one greater than 180o
In plane geometry, a shape with four sides, two of which are parallel and have the same length, cannot have a reflex angle.
cheesse
Answer Reflex Angle