Seki-kun suddenly starts playing with a remote control car on his desk... and seems to actually be studying something. Yokoi-kun sees this but... S-Seki-kun, just what are you studying?!
The sum of the interior angles of a polygon 
is found with the formula 180°*(n-2),
Die Summe aller Innenwinkel eines Vieleckes
 kann durch 180°*(n-2) ermittelt werden.
La medida del ángulo 
interior es N180°x (-2).
La medida del ángulo 
interior es N180°x (-2).
La somme des angles intérieurs
d’un polygone à n côtés
La somma degli angoli interni di un poligono 
si trova con la formula 180°*(n-2).
A soma dos ângulos internos dos
polígonos segue a fórmula 180°*(n-2),