autinbrooks2 autinbrooks2 10-04-2017 Mathematics contestada A triangle-shaped machine part has sides of 21/2 inches, 31/4 inches, and 5 inches. The triangle's perimeter is A. 11 1/2 inches. B. 10 1/8 inches. C. 10 3/4 inches. D. 11 3/8 inches.