A half turn is called a straight angle. It equals 180 degrees. For example, when the minute hand moves from 12 to 6, it makes a straight line, showing a straight angle. Answer: straight angle.
Class 5 Mathematics Maths-Mela Chapter 3 Angles as Turns question answer
Class 5 NCERT Maths-Mela Chapter 3 Angles as Turns solution
A half turn means covering half of the circle. This is known as a straight angle. It measures 180 degrees and looks like a straight line. For instance, if the minute hand moves from 12 to 6, it covers half the circle and points in the opposite direction, forming a straight angle. Doors or file covers opened fully in one direction also form straight angles.
For more NCERT Solutions for Class 5 Mathematics Maths-mela Chapter 3: Angles as Turns Extra Questions & Answer:
https://www.tiwariacademy.com/ncert-solutions/class-5/maths/maths-mela-chapter-3/