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?!
When you connect the 
interior angles of a polygon,
Wenn man die Innenwinkel eines Vieleckes miteinander verbindet,
Unendo gli angoli interni  
di un poligono,
Ao se conectaram internamente
os vértices de um polígono,