6th grade math
posted by some girl .
What is base measurement?
thanks

The term "base measurements" can have several different meanings.
How is it used in your problem? 
trying to find the area of a rectangle

Does your problem tell you how long the base of the rectangle is?

5 yards and the width is 3 yards

Ahh  that means the bottom of the rectangle is considered its base.
A = LW  or A = BH 
thanks

You're welcome.