9514 1404 393
Answer:
4+4√2 ≈ 9.66 units
Step-by-step explanation:
We can count the grid squares on the graph to see that the perimeter is the sum of 4 units and 4 times the diagonal of a unit square. That diagonal has length √(1²+1²) = √2, so the perimeter is ...
4 +4√2 ≈ 9.66 units
