Final answer:
The sum of the interior angles of a 15-sided polygon is calculated using the formula (n - 2) × 180°, which equals 2340°.
Step-by-step explanation:
The sum of the measures of the interior angles of a polygon can be found using the formula (n - 2) × 180°, where n is the number of sides in the polygon. For a 15-sided polygon, you would calculate it as follows:
(15 - 2) × 180° = 13 × 180° = 2340°.
Therefore, the correct answer is b. 2340°, which is the sum of the measures of the interior angles of a 15-sided polygon.