It is a reflex angle
The measure of the angle is the number of degrees in this case.
A reflex angle (Reflex measures over 180 and under 360, not 280.)
280
It is a reflex angle because it is greater than 180 degrees
80 The angles in a quadrilateral add up to 360 degrees. So if 3 angles = 280 the fourth angle is 360-280 = 80
40
An angle of 181 degrees is a reflex angle.
A reflex angle is more than 180 degrees but less than 360 degrees. Therefore the reflex angle to 85 degrees is 275 degrees (360 - 85 = 275).
21 An angle of 110 degrees is an obtuse angle.
48 degrees is an acute angle.
112 degrees is an obtuse angle.