Given the following question:
Judy's room is a square 15 feet long on each side
One roll of crepe paper equals 20 feet
[tex]\begin{gathered} \text{perimeter =} \\ 4\times s \end{gathered}[/tex][tex]\begin{gathered} 4\times15=60 \\ p=60ft \end{gathered}[/tex]The line she plans to hang the crepe paper from one corner to it's oppsite corner. So think about a X in the middle of the square. Since it's a square it will be particually smaller than the actual length of each side of the square.
[tex]60\div10=6[/tex]Let 10 represent the length of one side of the X
Let 60 represent the perimeter
Judy will need a minimum of 6 rolls of crepe paper for this party.
