Question

Which of the followings are the common mistakes that may occur while constructing a circle using a compass?

• A. The needle of the compass is shifted to another point
• B. The radius is changed due to loose hinge.
• C. The pencil lead becomes short after using
• D. The screw at the pencil holder is so tight that it cannot move

Answer 1

Answer: (A), (B)

The correct options are
A The needle of the compass is shifted to another point
B The radius is changed due to loose hinge.

The common mistakes that may occur are as follows:
The needle of the compass, i.e., the centre of the circle has shifted to another place. If this happens, the construction is incorrect.

The second common mistake is of changing the radius because of the loose hinge of the compass.

The pencil lead will become short while drawing because of the friction between the lead and the paper.

Also, it is better if the screw of the pencil holder is tight enough. It would not displace the pencil unnecessarily.