Would anyone know the correct answers to these three math questions? what is the sum of the measures of the interior angles of a 21-gon? what is the measure of an exterior angle of a regular pentagon? c) determine which of the following could be the side measures of a right triangle. select all that apply. 5 ft, 4 ft, 3 ft 6 ft, 4 ft, 2 ft 11 ft, 10 ft, 6 ft