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When an angle is drawn a small arc is normally placed near the vertex between the arms to show the angle. A reflex angle is one greater than 180°, so draw the two arms as normal and then draw a small arc around the vertex of the angle "outside" the arms of the angle, ie around the angle which is greater than 180° If the problem is how to draw the reflex angle with a protractor that only goes up to 180°, then note that "360° - the reflex angle" gives an angle which is less than 180° and can be measure by the 180° protractor. Draw one arm of the angle, measure the calculated angle (eg if the reflex angle was 200°, 360° - 200° = 160°, so measure 160°), draw the other arm, and then draw an arc around the vertex "outside" the arms to show the reflex angle (in the example, the 200° angle).
Eitheruse a 360o protractor;measure it the other way (the non-reflex angle) and subtract from 360o;[faintly] draw in the 180o line of one arm of the angle, measure from this to the other arm and add 180o.
No. A reflex angle starts after 180 degrees and ends just before 360.
Between 180 and 360 degrees.