What is the result of reflecting a triangle across a line of symmetry?

When a triangle is reflected across a line of symmetry, the resulting shape is a second triangle that is identical to the original triangle. This means that every corresponding point on the original triangle and the reflected triangle will be the same distance from the line of symmetry but on opposite sides of it. There are no changes to the size, shape, or angles of the triangle in this process, which emphasizes the concept of symmetry. This property ensures that the two triangles are congruent, thus confirming that the reflection produces an identical copy instead of altering the dimensions or orientation in any way.