The area is defined as A=(1/2)bh, where b is the base and h is the height. So you can set up an equation:(1/2)*28*h = 30814h = 308h = 22 metersDon't forget the units in your answer!
Hi Joan -
In your geometry course you should have been introduced to the area of a triangle as:
A = (1/2) x (base) x (height)
If the base is 28 meters and the area = 308 sq. meters you can use algebra to solve for the height:
308 sq. meters = (1/2) x (28 meters) x (height)
Hope this helps