7.3. What angle do the clock hands form at 12:20?
Answer: $110^{\circ}$.

Solution. At 12:00, the clock hands coincide. After this, in 20 minutes, the minute hand travels $1 / 3$ of the circumference, i.e., it describes an angle of $120^{\circ}$. The hour hand moves 12 times slower than the minute hand (since it describes one circle in 12 hours). Therefore, in 20 minutes, it will describe an angle of $120^{\circ}: 12=10^{\circ}$ and will form an angle of $120^{\circ}-10^{\circ}=110^{\circ}$ with the minute hand.