If a line segment of length 20 cm is reflected in a line of symmetry (mirror), then the reflection is a line of length ____ cm.
20

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Solution

The correct option is A 20
The image formed in a plane mirror is of the same length of the object. So, the image of the line would remain a line and there would be no change in its length.

$∴$ refelction is a line of length 20 cm.

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