MCQ practice · SSC General Mathematics Board questions · Chapter 14: Ratio, Similarity and Symmetry
What is the half-turn angle of an object about its centre of rotation?
Think it through first, then pick an option.
- a 90°
- b 180°
- c 270°
- d 360°
Answer and explanation
Correct answer: b 180°
A half turn is half of 360°, that is 180°.
Why the other options are wrong
- a 90°: 90° is only a quarter turn, not a half turn; a half turn is 180°.
- c 270°: 270° is three quarters of a turn, not a half turn; a half turn is 180°.
- d 360°: 360° is a full turn, not a half turn; a half turn is 180°.
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