Definitions [3]
Parallelogram: A parallelogram is a quadrilateral whose opposite sides are parallel.
Rhombus: A rhombus is a quadrilateral with four equal-length sides and opposite sides parallel to each other.
- Trapezium: A trapezium is a quadrilateral where only two sides are parallel to each other.
Formulae [5]
Formula: Perimeter
Perimeter = Sum of all side lengths
Formula: Area
Area = Amount of space inside a flat shape
Area of parallelogram = base x height
- Area of a rhombus = `1/2` x product of lengths of diagonals.
Area of the trapezium = `1/2` × sum of the lengths of parallel sides × height.
