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Which of the following angles is an example of a straight angle?
  • a)
    The angle formed by the hands of a clock at 3 o'clock.
  • b)
    The angle formed when a door is half-opened and aligned with the opposite wall.
  • c)
    The angle between the blades of slightly open scissors.
  • d)
    The angle between two parallel lines.
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following angles is an example of a straight angle?a)The ...
Understanding Angles
Angles are formed when two lines meet at a point. They are classified into different types based on their measures. A straight angle is defined as an angle that measures exactly 180 degrees, which essentially forms a straight line.

Options Analysis
Let's analyze the provided options to identify which describes a straight angle:
  • a) The angle formed by the hands of a clock at 3 o'clock.
    • This angle is 90 degrees, not 180 degrees. Hence, it is a right angle.


  • b) The angle formed when a door is half-opened and aligned with the opposite wall.
    • When a door is half-opened, it typically makes an angle of 180 degrees with the wall if it is perfectly straight. This is a straight angle!


  • c) The angle between the blades of slightly open scissors.
    • This angle is much less than 90 degrees and does not represent a straight angle.


  • d) The angle between two parallel lines.
    • Parallel lines do not intersect, so no angle is formed between them.





Conclusion
Therefore, option **b** is correct because it describes a scenario where the angle formed is indeed a straight angle, measuring 180 degrees. The other options either describe different types of angles or do not form an angle at all.
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Community Answer
Which of the following angles is an example of a straight angle?a)The ...
A straight angle measures 180° and looks like a straight line. When a door is half-opened and perfectly aligned with the opposite wall, it forms a straight angle.
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Which of the following angles is an example of a straight angle?a)The angle formed by the hands of a clock at 3 o'clock.b)The angle formed when a door is half-opened and aligned with the opposite wall.c)The angle between the blades of slightly open scissors.d)The angle between two parallel lines.Correct answer is option 'B'. Can you explain this answer?
Question Description
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