Now that she's re-learned how to ride a bike, Hiromi and Tomoe decide to go on a cycling tour of the city of Kamakura. They go sightseeing with Mori Shiki-sensei, who they run into on their tour, and Hiromi gets lost while practicing during a break.
Your knee should be bent 
about 160 to 170 degrees.
.يجب أن تكون ركبتك مثنيّة بين 160 إلى 170 درجة
Dein Knie muss ungefähr in einem
Winkel von 160° bis 170° gebeugt sein.
La rodilla debe doblarse
entre 160 y 170 grados.
La rodilla debe doblarse
entre 160 y 170 grados.
L’angle de votre genou doit être
d’environ 160 à 170 degrés.
Il ginocchio dev'essere
piegato dai 160 ai 170 gradi.
A dobra do seu joelho deve 
estar de 160 a 170 graus.