Circumference 21603

The circumference of the diamond is 29.6dm.
a - calculate the length of its side
b - calculate the area of the diamond if its height measures 5 dm

Correct answer:

a =  7.4 dm
S =  37 dm²

Step-by-step explanation:

$$\begin{gathered} o=29.6\text{dm} \\ o=4a \\ a=o/4=29.6/4=7.4\text{dm} \end{gathered}$$

$$\begin{gathered} v=5\text{dm} \\ S=a\cdot v=7.4\cdot 5=37{\text{dm}}^2 \end{gathered}$$

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