Calculating missing side lengths from the area of a trapezium | Maths

Starter quiz

Calculate the area of the trapezium (you do not need to state the units).
- '29.75' ✓
Calculate the area of the trapezium (you do not need to state the units).
- '32' ✓
Calculate the area of the trapezium (you do not need to state the units).
- '46' ✓
Calculate the area of the trapezium (you do not need to state the units).
- '56' ✓
Calculate the area of the trapezium (you do not need to state the units).
- '77' ✓
Calculate the area of the trapezium (you do not need to state the units).
- '34.5' ✓

Calculate the area of the trapezium (you do not need to state the units).
- '10' ✓
Calculate the area of the trapezium (you do not need to state the units).
- '13.125' ✓
Calculate the area of the trapezium (you do not need to state the units).
- '9.35' ✓
What is the value of $b$ ?
- 4 ✓
- 14
- 16
- 32
What is the value of $d$ ?
- 5
- 5.5
- 6
- 7 ✓
What is the value of $h$ ?
- 3
- 5
- 9
- 11 ✓

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Pupils may forget to divide by 2 when calculating the area of a trapezium.

The area of a trapezium is half of the area of the parallelogram formed from two identical trapeziums.

Trapezium - A trapezium is a quadrilateral with exactly one pair of parallel opposite sides.
Trapezia/trapeziums - The plural of trapezium can be referred to as trapezia or trapeziums.