Quadrilateral Key Features A shape with four sides. Lines of Symmetry? It depends on what sort of quadrilateral it is. Rotational Symmetry? It depends on what sort of quadrilateral it is. Names of Special Quadrilaterals Rectangle, Square, Parallelogram, Trapezium, Rhombus, Kite.

Rectangle Key Features A quadrilateral with four right-angles. Opposite sides are the same length. Lines of Symmetry? Two, unless the rectangle is a square. Rotational Symmetry? Order 2, unless the rectangle is a square. Is a Rectangle a Parallelogram? Yes, because both pairs of opposite sides are parallel.

Square Key Features A quadrilateral with four equal sides and four right-angles. Lines of Symmetry? Four. Rotational Symmetry? Order 4. Is a Square a Rectangle? Yes, because it’s a quadrilateral with four right-angles. Is a Square a Parallelogram? Yes, because both pairs of opposite sides are parallel. Is a Square a Rhombus? Yes, because it’s got four sides all the same length.

Parallelogram Key Features A quadrilateral with opposite sides that are parallel and the same length. Lines of Symmetry? Only if it’s a rectangle, a square or a rhombus. Rotational Symmetry? Order 2.

Oblong Key Features A rectangle which is not a square. Lines of Symmetry? Two. Rotational Symmetry? Order 2. Is an Oblong a Parallelogram? Yes, because both pairs of opposite sides are parallel.

Trapezium Key Features A quadrilateral with just one pair of parallel sides. Lines of Symmetry? Only if it’s an isosceles trapezium. Rotational Symmetry? None.

Rhombus Key Features A quadrilateral with four equal sides. Lines of Symmetry? Two. Rotational Symmetry? Order 2. Is a Rhombus a Parallelogram? Yes, because both pairs of opposite sides are parallel.

Kite Key Features A quadrilateral with two pairs of adjacent sides that are equal. Lines of Symmetry? One. Rotational Symmetry? None.