Intro to Symmetry

lines of symmetry

Lines of symmetry

• symmetry is when two or more parts are identical after a flip .

• The simplest form of symmetry is reflection .

• A 2D shape is symmetrical .

• A line can be drawn through it so that either side of the line looks EXACTLY the same .

• the line is called a line of symmetry .

Look at this picture

Lines of Symmetry of a Square

In a square, there are four lines of symmetry, each of which divides it into two identical parts. The symmetry lines of a square are both its diagonals and the lines joining the midpoints of its opposite sides 

Lines of Symmetry of a Rectangle

A rectangle has 2 lines of symmetry. The lines of symmetry in a rectangle cut its opposite sides into equal parts.

Complete the following