Area of Trapeziums Flashcards

GCSE Mathematics (Edexcel) 1MA1

Trapezium

A quadrilateral with one pair of parallel sides.

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Terms in this set (10)

Trapezium

A quadrilateral with one pair of parallel sides.

Parallel sides of a trapezium

The two opposite sides of a trapezium that are parallel to each other.

Non-parallel sides of a trapezium

The two sides of a trapezium that are not parallel.

Area of a trapezium formula

Area = 1/2 × (a + b) × h, where a and b are the lengths of the parallel sides, and h is the perpendicular height.

What does 'a' and 'b' represent in the trapezium formula?

'a' and 'b' represent the lengths of the parallel sides of the trapezium.

What does 'h' represent in the trapezium formula?

'h' represents the perpendicular height between the parallel sides of the trapezium.

Units for area of a trapezium

The area is measured in square units, such as cm² or m².

Key step to find the area of a trapezium

Add the lengths of the parallel sides, multiply by the height, and then divide by 2.

Perpendicular height in a trapezium

The shortest distance between the two parallel sides.

Example of finding the area of a trapezium

If a trapezium has parallel sides of 8 cm and 12 cm, and a height of 5 cm, the area is 1/2 × (8 + 12) × 5 = 50 cm².

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