Calculate

Calculate the square area if its perimeter is 14dm.

Correct result:

S =  12.25 dm2

Solution:

o=14 dm  o=4a a=o/4=14/4=72=3.5  S=a2=a⋅ a S=a⋅ a=3.5⋅ 3.5=494=12.25 dm2

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