Question

Describe the symmetry of the plane figure shown below. Select all that apply.

A.horizontal line symmetry

B.vertical line symmetry

C.diagonal line symmetry

D.rotational symmetry

Answer 1

• B. vertical line symmetry
• C. diagonal line symmetry
• D. rotational symmetry

Explanation:

Any line through a vertex and the center of the opposite side is a line of symmetry. One of them is vertical in the figure shown. Two of them are diagonal. The three lines are 360°/3 = 120° apart, so the figure has 3-fold rotational symmetry.