![](https://images.gutefrage.net/media/default/user/10_nmmslarge.png?v=1551279448000)
![](https://images.gutefrage.net/media/user/LeonK091/1611602421173_nmmslarge__247_0_804_804_30f847613b90b636b9cef5ac566b6d1a.jpg?v=1611602421000)
a) U=2r*pi
U=13.2 *2 *pi
U=82.94cm
82.94*45 = 3732.21cm
b) A = r^2 * pi
A= 13.2^2 * pi
A= 547.39cm^2
547.39 * 3 weil es ja 3 Stunden sind.
= 1642.17cm^2
LG
a) U=2r*pi
U=13.2 *2 *pi
U=82.94cm
82.94*45 = 3732.21cm
b) A = r^2 * pi
A= 13.2^2 * pi
A= 547.39cm^2
547.39 * 3 weil es ja 3 Stunden sind.
= 1642.17cm^2
LG