Answer
27 ft.
Work Step by Step
RECALL:
The perimeter of a polygon is equal to the sum of the lengths of all its sides.
Add the lengths of all the sides of the triangle to find the perimeter:
perimeter = $9+7+11= 27$ feet
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.