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SAI INTERNATIONAL SCHOOL
CBSE CURRICULUM
Class: VI Lesson Note 9.2
SUBJECT: Mathematics
CH: 9 -Symmetry
Sub Topic: Line of Symmetry
→ If one half of a shape can be folded into the other half, that is one half of the figure would
fit exactly into the other half, then the figure is said to have symmetry.
→ If a line divides a figure into two parts such that when the figure is folded about this line,
the two parts of the figure coincide, then this line is known as the line of symmetry or axis of
symmetry.
→ A figure having more than one line of symmetry ¡s said to have multiple lines of
symmetry.
Figures with more than one line of symmetry
→ A figure that has a line(s) of symmetry is thus also said to have reflection symmetry.
→ Symmetrical shapes can be created by paper folding and cutting or punching holes.
Figure (a) shows the picture of a blue triangle with a dotted line. What if you fold the triangle
along the dotted line? Yes, one half of the triangle covers the other half completely. These are
called mirror halves!
