Symmetrical and Non Symmetrical Shapes

The video tutorial explains the concept of symmetry, defining a shape as symmetrical if it can be divided into two identical halves by a line of symmetry. It provides examples of symmetrical shapes, such as a butterfly and the letter X, and discusses their lines of symmetry. The tutorial also examines a parallelogram, concluding it is not symmetrical due to the lack of identical halves. Additionally, it explores symmetry in polygons and trapezoids, highlighting the presence or absence of lines of symmetry. The lesson concludes by summarizing how to identify symmetrical shapes and count their lines of symmetry.

What is the line called that divides a shape into two identical halves?

• Line of division

• Axis of rotation

• Line of symmetry

• Line of reflection

How many lines of symmetry does the letter X have?

• One horizontal line

• Four lines

• Two diagonal lines

• One vertical line

Why is a parallelogram not considered symmetrical?

• It has no parallel lines

• It has no identical halves

• It has only one line of symmetry

• It has curved edges

Which type of line of symmetry does the discussed polygon have?

• Diagonal

• Horizontal

• None

• Vertical

How many lines of symmetry does the trapezoid have?

• Three

• Two

• None

• One