Area of Trapezium
The area of a trapezium is the measure of the region enclosed by its four sides. To calculate the area of a trapezium, you can use the formula:

A = 1/2 * (a + b) * h
where:
- a and b are the lengths of the parallel sides of the trapezium
- h is the height or perpendicular distance between the parallel sides

Steps to Calculate the Area of a Trapezium:
1. Identify the lengths of the parallel sides a and b of the trapezium.
2. Determine the height h of the trapezium, which is the perpendicular distance between the parallel sides.
3. Plug the values of a, b, and h into the formula A = 1/2 * (a + b) * h.
4. Calculate the area using the formula to find the measure of the region enclosed by the trapezium.

Example:
Let's say a trapezium has parallel sides of length 5 cm and 7 cm, with a height of 4 cm.
Using the formula,
A = 1/2 * (5 + 7) * 4
A = 1/2 * 12 * 4
A = 6 * 4
A = 24 cm²
Therefore, the area of the trapezium is 24 square centimeters.

1/2 × sum of parallel sides × height