The parallel sider of a trapezium are 25 cm and 11 cm, while its nonparallel sides are 15 cm and 13 cm. find the area of the trapezium.

The area is 12(11+25)/2

To find the area of a trapezium, we can use the formula:

Area = (sum of parallel sides / 2) * height

In this case, the parallel sides are 25 cm and 11 cm, and the nonparallel sides are 15 cm and 13 cm.

To find the height, we need to subtract the lengths of the nonparallel sides from the parallel sides. In this case:

Height = 25 cm - 15 cm = 10 cm

Now, we can substitute the values into the formula:

Area = ((25 cm + 11 cm) / 2) * 10 cm
= (36 cm / 2) * 10 cm
= 18 cm * 10 cm
= 180 cm^2

Therefore, the area of the trapezium is 180 cm^2.

Altitude h = 12 I think

on one side you have a 5, 12, 13 right triangle
and on the other a 9 , 12 , 15 right triangle (a 3,4,5 times 3)
so
average base = (11+25)/2 = 18
altitude = 12
area = 12 * 18

216 cmsquare