The measures of the sides of a triangle are in the extended ratio 2 : 5 : 11, The perimeter is 90ft. Which of the following lengths is the shortest side? A. 2 feetB. 10 feet C. 5 feet

Add the proportion
2+5+11=18
Divide 90 by 18
Multiply the result of 90/18 by the shortest side (2 in this case) to get the final answer.