Symmetry

Line of Symmetry

If a shape has a line of symmetry, the line of symmetry will divide the shape into two equal parts.

One half of the shape can be folded along the line of symmetry to fit exactly onto the other half.

Rotational Symmetry

If rotating a shape through an angle (< 360°) produces an identical shape, it has rotational symmetry.

When rotating through 360°, an equilateral triangle match its own outline 3 times. So it has rotational symmetry of order 3.

Shapes and their Symmetries

Symmetry in Alphabets

Consider alphabets : A, B, C,.....Z

Which of these alphabets has Line(s) of Symmetry and what is their order of rotational symmetry?