Page 140 - Maths Skill - 6
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138 Maths
MIND MAP
Symmetry
“Symmetry occurs when one shape becomes exactly like another, if we flip, slide or turn it”.
Polygon Lines of Symmetry Number of Lines of Symmetry
Equilateral Triangle
3
Square 4
Pentagon 5
Hexagon
6
Heptagon
7
Order of Rotational Symmetry
360°
Order of rotational symmetry =
Angle of Rotation
Rememberable Points
� A circle has infinite lines of symmetry.
� A parallelogram has no lines of symmetry.
� The number of lines of symmetry in the regular polygons will
be equal to the number of sides in that regular polygon.
