Answer:
Explanation:
To find the area of a trapezium with parallel sides AB and CD, we can use the formula:
Area = (AB + CD) * height / 2
In this problem, we know that:
AB = 30 cm
CD = 20 cm
DA = 9 cm
We can use these measurements to find the height of the trapezium:
height = DA = 9 cm
Now we can substitute these values into the area formula:
Area = (30 + 20) * 9 / 2
Area = 50 * 9 / 2
Area = 450 / 2
Area = 225 sq cm
So the area of the trapezium is 225 sq cm.
Note that this is only one of the ways to calculate the area of a trapezium and you could have also used the height(in this case 17cm) and the breadth to calculate the area of the trapezium as well.