$\displaystyle\text{150 yards}\cdot\frac{\text{3 feet}}{\text{1 yard}}=\text{450 feet}\usepackage{cmbright}\Huge\$

To find the perimeter of a rectangle, you can use the formula $\displaystyle\text{perimeter = length + length + width + width}\usepackage{cmbright}\Huge\$ .

$\displaystyle\text{450 feet + 450 feet + 200 feet + 200 feet = 1,300 feet}\usepackage{cmbright}\Huge\$