Answer:
The length of fencing Matias needs is 51 meters
Explanation:
The given parameters are;
The dimensions of Matias' backyard from which half is to be turned into a chicken pen = 24 m by 45 m
The orientation of the fence that is will be made for the chicken pen = Stretch diagonally across the backyard (from a corner to the opposite corner)
From the question, Matias' backyard is rectangular in shape
Therefore, by Pythagoras theorem;
The length of the diagonal fence = √((24 m)² + (45 m)²) = 51 m
Matias needs 51 meters of fencing for the diagonal fence.