From 3 to 9, the hour hand moves across half of the clock face. This is a half turn, forming a straight angle of 180°. It points in the opposite direction after this turn.
class 5 Maths-Mela Mathematics Textbook Chapter 3 Angles as Turns question answer
CBSE Class 5 Maths-Mela Chapter 3 Angles as Turns solutions
The hour hand moves from 3 to 9, which covers half of the clock’s face. This movement is exactly a half turn. A half turn equals a straight angle of 180°. For example, when the hour hand points at 3, then moves to 9, it shifts from the right side of the clock to the left, creating a straight line.
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