You must know what type of geometric shape it is. However, if it is a rectangle (and you know the width), then then the formula is Area/Width=height. Edit your question if it is a different shape.
Area = Base * Height so Base = Area/Height
Divide the area by the height
Area = 0.5*Base*Height
You find the height by using Pythagoras' theorem and then 0.5*base*height = area.
Find the area of the base, find the height of the pyramid. Volume = (1/3)*(area of base)*(height)
Area = 1/2 * base * height.
Divide the area by height then you get the base.
base = (2*area)/height
It is found by: base = (area*2)/height
1/2*base*height = area height = (2*area)/base
To find the area of a parallelogram, multiply the length of the base by the height. The height should be perpendicular to the base.
To find the area of a parallelogram, multiply the length of the base by the height. The height should be perpendicular to the base.