math4th grade
posted by alysha on .
a worker is usin boards to divide a rectangular animal pen into a row of 12 smaller goat pens. uhow many boards does the worker need?

Draw a picture of it. How many boards does the worker need?

It depends upon the width of the boards used. Let's assume they are as wide as the pen height needs to be (which is unlikely).
To divide the rectangle into a 4 x 3 array or 12 equal areas, five boards are needed. They will have to be notched where they intersect. 
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