\[C = 2\pi r = 2\pi \cdot 36 = 72\pi =\]
\[= 72 \cdot 3,14 = 226,08\ см.\]
\[\frac{5}{9} \cdot 226,08 = 25,12 \cdot 5 =\]
\[= 125,6\ см.\]
\[Ответ:125,6\ см.\]