Geometrie-Kreis-Kreis

$d= 2\cdot r$
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
$r= \frac{d}{2}$
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
$A = r^{2} \cdot \pi$
1 2 3 4 5 6 7 8 9 10 11 12
$r = \sqrt{\frac{A}{\pi }}$
1 2 3 4 5 6
$U = 2\cdot r\cdot \pi$
1 2 3 4 5 6 7
$r = \frac{ U}{2\cdot \pi }$
1 2 3 4 5 6 7 8 9 10
Beispiel Nr: 01
$\begin{array}{l} \text{Gegeben:}\\\text{Kreiszahl} \qquad \pi \qquad [] \\ \text{Fläche} \qquad A \qquad [m^{2}] \\ \\ \text{Gesucht:} \\\text{Radius} \qquad r \qquad [m] \\ \\ r = \sqrt{\frac{A}{\pi }}\\ \textbf{Gegeben:} \\ \pi=3\frac{16}{113} \qquad A=5m^{2} \qquad \\ \\ \textbf{Rechnung:} \\ r = \sqrt{\frac{A}{\pi }} \\ \pi=3\frac{16}{113}\\ A=5m^{2}\\ r = \sqrt{\frac{5m^{2}}{3\frac{16}{113} }}\\\\r=1,26m \\\\ \small \begin{array}{|l|} \hline A=\\ \hline 5 m^2 \\ \hline 500 dm^2 \\ \hline 5\cdot 10^{4} cm^2 \\ \hline 5\cdot 10^{6} mm^2 \\ \hline \frac{1}{20} a \\ \hline 0,0005 ha \\ \hline \end{array} \small \begin{array}{|l|} \hline r=\\ \hline 1,26 m \\ \hline 12,6 dm \\ \hline 126 cm \\ \hline 1,26\cdot 10^{3} mm \\ \hline 1,26\cdot 10^{6} \mu m \\ \hline \end{array} \end{array}$