Finding Lines of Symmetry in Shapes

Medium Geometry And Spatial Sense Symmetry

In the figure below, there are two shapes: a square and a triangle. The square has sides of length 4 cm, and the triangle is an equilateral triangle with sides of length 4 cm as well.
Square and Triangle
Which shape has lines of symmetry? Remember, a line of symmetry is a line where you can fold the shape and both sides match perfectly.