Question

choose the figure with three lines of symmetry.

Explanation:

Step1: Analyze rectangle symmetry

A rectangle has 2 lines of symmetry (vertical and horizontal through midpoints).

Step2: Analyze trapezoid symmetry

The right trapezoid has 0 lines of symmetry.

Step3: Analyze star symmetry

A 5-pointed star has 5 lines of symmetry.

Step4: Analyze triangle symmetry

An equilateral triangle (the given triangle) has 3 lines of symmetry, each from a vertex to the midpoint of the opposite side.

Answer:

The light yellow equilateral triangle (bottom-right figure)