A reflex angle is one that is greater than 180 degrees (a straight line) but less than 360 degrees (a full circle).
When two lines meet (not cross), they will form two angles. Unless they meet head on, one of these will be less than 180 degrees and the other will be more; the two of them will add to 360 degrees. Conventionally the smaller of the two angles will be used as a measure of the angle. The reflex is the larger of the two.
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The sum of an angle and its reflex equal 360 degrees.
they both measure the angle in degrees
An angle of 343 degrees is a reflex angle
An angle of 331 degrees is a reflex angle
It is a reflex angle.