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).
The sum of all 8 interior angles is given by. Since each interior angle has the same measure, we divide by 8 to find the measure of one interior angle: . Each exterior angle is supplementary to this and therefore must have measure 45Âº. The diagram given below shows a regular pentagon.