Question

The waiter places a bowl of soup in front of Igor. In a counterclockwise direction, he passes the soup to Elan who then passes it to Abbey. Which two rotations about the center of the table describe passing the soup?


A) first 80° and then 80°


B) first 120° and then 120°
C) first 144° and then 144°
D) first 160° and then 160°

Answer 1

`\alpha=(360^o)/(12)=30^o\\\\Igor-Elan\to4\cdot30^o=120^o\\\\Elan-Abbey\to4\cdot30^o=120^o\\\\Answer:C`