Question

is the dotted line a line of symmetry?

Explanation:

Step1: Recall the definition of a line of symmetry

A line of symmetry divides a figure into two congruent (identical) parts.

Step2: Check the two - sided congruence

When we consider the dotted line in the chair figure, if we were to fold the chair along this line, the two sides would not match exactly. For example, the armrests and the overall shape on either side of the dotted line are not mirror - images of each other.

Answer:

No, the dotted line is not a line of symmetry.