Hello,
\(1) \\
cos(\widehat{HKR})= \dfrac{9}{41} ==\ \textgreater \ \widehat{HKR}=1.34948188...rad\\\\
sin(\widehat{KHR})= \frac{9}{41} ==\ \textgreater \ \widehat{KHR}=0,22131444...rad\\\\\)
\(\widehat{QKA}=\pi-1,34948188...=1,792110769...rad\\\\
$\overset{\frown}{QA}$=24*1,792110769...=43,010658459...\\\\
\widehat{KHB}= \frac{\pi}{2}-0,22131444...=1,3494888...\\\\
$\overset{\frown}{PB}$=15*1,3494888...=20,2422282\\\\\)
2)
\(|HR|=\sqrt{9^2+41^2} =41,976183723\\\\\)
length=2*(43,010658459+20,2422282+41,976183723)=210,458140764
