Question

which dashed line is a line of symmetry?

Explanation:

Step1: Recall line - of - symmetry definition

A line of symmetry divides a figure into two congruent parts such that the parts are mirror images of each other.

Step2: Analyze Option A

If we fold the figure in option A along the dashed line, the two parts do not match exactly.

Step3: Analyze Option B

When we fold the figure in option B along the dashed line, the two parts are mirror - images of each other and congruent.

Step4: Analyze Option C

Folding the figure in option C along the dashed line does not result in two congruent parts.

Step5: Analyze Option D

Folding the figure in option D along the dashed line does not give two congruent parts.

Answer:

B.