Rotational Symmetry

🎬 Video Tutorial

(0:01) Rotational Symmetry: A shape has rotational symmetry if it can be rotated less than 360° and still look the same.
(0:16) Centre of Rotation: The fixed point around which a shape rotates. For most regular polygons, the centre of rotation is the geometric centre of the shape.
(0:28) Angle of Rotation Formula: Found by dividing 360° by the order of symmetry. E.g., a square has an angle of rotation of 90° (360° ÷ 4).
(0:42) Order of Symmetry: The order of symmetry is the number of times a shape aligns with itself during a 360° rotation. For instance, an equilateral triangle has an order of symmetry of 3.