# Perimeter to area

Calculate the area of a circle with the perimeter 15 meters.

Correct result:

S =  17.905 m

#### Solution:

$o=15 \ \\ r=o / (2 \pi)=15 / (2 \cdot \ 3.1416) \doteq 2.3873 \ \\ S=\pi \cdot \ r^2=3.1416 \cdot \ 2.3873^2=17.905 \ \text{m}$

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