To find the length of a side of the rhombus, multiply $\displaystyle 9$ times $\displaystyle \frac{4}{3}$. 

Thus, the solution is:

$\displaystyle \frac{9}{1}\times\frac{4}{3}=\frac{36}{3}=12$

The perimeter of a rhombus is equal to $\displaystyle p=4S$, where $\displaystyle S=$ the length of one side of the rhombus. 

Since $\displaystyle P=124$, we can set up the following equation and solve for $\displaystyle S$.

$\displaystyle 124=4\times (S)$

$\displaystyle S=\frac{124}{4}=31$

To find the length of a side of the rhombus, work backwards using the formula: 

$\displaystyle A=(base\times height)$

Since we are given the area and the height we plug these values in and solve for the base.

$\displaystyle 360=(base\times 8)$

$\displaystyle base=\frac{360}{8}=45$

To find the length of a side of the rhombus, work backwards using the area formula: 

$\displaystyle Area=(base\times height)$

Since we are given the area and the height we plug these values in and solve for the base.

$\displaystyle 69=(base\times 6)$

$\displaystyle base=\frac{69}{6}=11.5$

To solve for the length of one side of the rhombus, apply the perimeter formula:

$\displaystyle P=4(S)$, 

$\displaystyle S=$ the length of one side of the rhombus. 

Since we are given the area we plug this value in and solve for $\displaystyle S$.

$\displaystyle 720=4(S)$

$\displaystyle S=\frac{720}{4}=180$

Since the area is equal to $\displaystyle 39$ square units, use the formula: 

$\displaystyle A=(base\times altitude)$

Since we are given the area and the height, we plug these values in and solve for the base.

$\displaystyle 39=(base\times 3)$

$\displaystyle base=\frac{39}{3}=13$

Since $\displaystyle P=520$

The solution is:

$\displaystyle P=4(S)$, where $\displaystyle S=$ the length of one side of the rhombus. 

Thus, 

$\displaystyle 520=4(S)$

$\displaystyle S=\frac{520}{4}=130$

To find the length of a side of the rhombus, work backwards using the area formula: 

$\displaystyle Area=(base\times height)$

Since we are given the area and the height, we plug these values into the equation and solve for the base.

$\displaystyle 645=(base\times 15)$

$\displaystyle base=\frac{645}{15}=43$

To find the length of a side of the rhombus, work backwards using the area formula: 

$\displaystyle Area=(base\times height)$

Since we are given the area and the height, we plug these values into the equation and solve for the base.

$\displaystyle 85=(base\times height)$

$\displaystyle 85=(base\times 5)$

$\displaystyle base=\frac{85}{5}=17$

To find the length of a side of the rhombus, apply the formula: $\displaystyle p=4(S)$, where $\displaystyle S$ is equal to the length of a side of the rhombus. 

Since we are given the perimeter we plug that value into the equation and solve for $\displaystyle S$. 

Therefore the solution is:

$\displaystyle 14=4(S)$

$\displaystyle S=\frac{14}{4}=3.5$