The minute hand at 30 minutes points at the 6 on the clock.
The minute hand position from 12 o'clock:
Minute hand angle=30×6°
Minute hand angle=180°
The hour hand at 8:30 is past the 8 and has moved partway toward the 9.
At 8:00, the hour hand position from 12 o'clock:
Hour hand angle at 8:00=8×30°
Hour hand angle at 8:00=240°
In 30 minutes, the hour hand moves:
Additional movement=30×6030°
Additional movement=15°
Total hour hand position at 8:30:
Hour hand angle=240°+15°
Hour hand angle=255°
The angle between the hands:
Angle=∣255°−180°∣
Angle=75°
Therefore, the angle between the clock hands at 8:30 is 75°.