Caring for Muscle and Bone Injuries Questions taken from Chapter 19 of Emergency Medical Responder - First on Scene (9th Edition) Progress Indicator: Question 2 of 20 2.  Determine the perimeter of an entry 20 feet across the top, 23 feet across the bottom, and 5 feet 6 inches high. View solution Choices: 48.6 feet 54.4 feet 62.7 feet 78.6 feet