15 POINTs_ NEED ASAP! Tell whether the following statements are true or false, explain the reasoning.

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

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

The box plots show the average speeds, in miles per hour, for the race cars in two different races. which correctly describes the consistency of the speeds of the cars in the two races?