Answer: 6 feet
Step-by-step explanation:
Given: A farmer needs to enclose a section of land in the shape of a parallelogram by using one side of a barn for one side.
We know that in parallelogram opposite sides are equal.
Since, it is given that the barn and the side opposite of the barn will both be 10 feet long.
Therefore, if one of the other sides will be 6 feet long.
Then, the length of the last side must be 6 feet long because it is opposite to the 6 feet long side.
