Help me with this question plz thx!!

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

Acylinder and its dimensions are shown. which equation can be used to find v, the volume of the cylinder in cubic centimeters?