What is symmetry line ??

hoi

The line of symmetry is the line which passes through the centre of the object or any shape. It is considered as the axis or imaginary line of the object. In geometry, you must have learned well about the term symmetry which is defined as a balanced and a proportionate similarity found in two halves of an object, that is, one-half is the mirror image of the other half...

Hoi~

A symmetry line is a li which shows that both of the shapes halfs are equal or not.

Explanation:

letter d is correct.

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