reflex angle

If the corresponding interior angle is a reflex angle, the exterior angle should be considered negative.

Make lists of all the acute angles, obtuse angles and reflex angles.

Angles which are between 90 and 180 are called obtuse angles and all angles greater than 180 are called reflex angles.

"As I was saying, before you so rudely interrupted me, that is a matter for reflexion, and I am of course the one to do it, being a reflex angle.

All that now remains is to fit the stand-offs and stretchers (also called whiskers or whiskas in some kites) which enable the kite to adopt its conical shape, and as described earlier, to Induce 'washout' or reflex angle at the tips.