When the time on the clock is 12:00, the angle formed between the hour and the minute hand is ____
right angle
straight angle
zero angle
acute angle
At 12:00, the hour and the minute hand coincide with each other. In this case, the included angle is 0º. This is known as zero angle.
When a clock is showing time as 12:00, the angle included between the hour and the minute hand is a _______.