<PRE><B>Question 294615</B>
A = (1/2) x base x height

You know A = 4
         B = 2.5
Now plug in the values into the equation

4 = (1/2) x 2.5 x H
4 = 1.25 x H

Divide both sides by 1.25 to get height by itself
(4/1.25) = (1.25 x H)/1.25
     3.2 = H

The height of the triangle is 3.2 meters</PRE>