The condition is thought to be caused by a combination of side effects of the drug (clenching and grinding of teeth, dry mouth) and lifestyle factors (infrequent oral hygiene, frequent consumption of sugary drinks), which may be present in long term users.
An Interior Angle is an angle inside a shape. Note: When we add up the Interior Angle and Exterior Angle we get a straight line, 180Â°. (See Supplementary Angles).
1. countable noun. 1  A right angle is an angle of ninety degrees. 2  the angle between two radii of a circle that cut off on the circumference an arc equal in length to one quarter of the circumference; an angle of 90Â° or Ï/2 radians. 3  an angle of 90 degrees; angle made by the meeting of two straight lines perpendicular to each other.