Answer:

Step-by-step explanation:
The area of a trapezium is
(where
are the parallel sides and
is the perpendicular height)
Area of trapezoid 

∴ The area of the trapezoid is
Hope this helps :)
If you assume that each side shares a corner post then it takes 12 fence posts.
Infinite intervals are closed if they contain a finite endpoint, and open otherwise. The entire real line is an infinite interval that is both open and closed
A quadrilatetal with two different pairs of equal and parallel sides.