(KS2, Year 6)
The LessonA trapezoid is a four sided shape with one pair of opposite parallel sides.
Dictionary DefinitionThe Oxford English Dictionary defines a rectangle as "a quadrilateral figure having only two sides parallel."
Parts of a Trapezoid
The parallel sides of a trapezoid are called bases.
The other sides of a trapezoid are called legs or lateral sides.
Properties of Trapezoids
Only one pair of sides of a trapezoid is parallel.
The other pair of sides is not parallel.
The Perimeter of a TrapezoidThe perimeter of a trapezoid is given by the formula:
In this formula, b1 and b2 are the lengths of the bases of the trapezoid and l1 and l2 are the lengths of the legs of the trapezoid.
The Area of a TrapezoidThe area of a trapezoid is given by the formula:
In this formula, b1 and b2 are the lengths of the bases of the trapezoid and h is the height of the trapezoid.
Read more about how to find the area of a trapezoid
Interactive WidgetHere is an interactive widget to help you learn about trapezoids.
Trapezoid, TrapeziumThe shape is called a trapezoid in North America. In English speaking countries outside North America, a trapezoid is called a trapezium.
What's in a Name?Trapezoid and trapezium come from the Greek word "trapezion" meaning 'little table'.
A Trapezoid is a PolygonA trapezoid is a type of polygon. A polygon is a 2-dimensional shape with straight sides. A trapezoid is an irregular polygon. Irregular polygons have different length sides and different angles.
A Trapezoid is a QuadrilateralA trapezoid is a quadrilateral. A trapezoid is a four-sided polygon. Parallelograms, rectangles and squares are also quadrilaterals.
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