Depending on the length of the jump rope but usually you may need both feet and inches. By checking the average lengths of a jump rope you have: 7ft, 8ft,9ft,10ft for different heights so from this information the correct answer is feet

==================================
<em />
<em>"Associate with people who are likely to improve you."</em>
Angles 1 and 3 are supplementary
Consider this solution. Pls, make a design according the local requirements.