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).
A central interior angle of any regular polygon is 360Â°/n, where n is the number of sides of the polygon. Since the polygon is regular, then it is comprised of n triangles, each with congruent measures of the vertices at the center and two equal measure base angles at the perimeter of the polygon.