To find the measure of each interior angle of a regular pentagon, we can use the formula:
Interior Angle = (n – 2) × 180° / n
where n is the number of sides. A pentagon has 5 sides, so:
Interior Angle = (5 – 2) × 180° / 5 = 3 × 180° / 5 = 540° / 5 = 108°
Thus, each interior angle of a regular pentagon is 108 degrees. Therefore, the correct answer is c) 108.