# Calculate

Calculate the square area if its perimeter is 14dm.

Result

S =  12.25 dm2

#### Solution:

$o = 14 \ dm \ \\ \ \\ o = 4a \ \\ a = o/4 = 14/4 = \dfrac{ 7 }{ 2 } = 3.5 \ \\ \ \\ S = a^2 = a \cdot \ a \ \\ S = a \cdot \ a = 3.5 \cdot \ 3.5 = \dfrac{ 49 }{ 4 } = 12.25 = 12.25 \ dm^2$

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