400
Rosalind owns a corn field and has placed fences around four poles, A, B, C, D that delimit the edges of the field. She needs to drive around the field every day to check whether anybody has tried to break in. The four poles are located at:
A(4,0)
B(12,-6)
C(4,-12)
D(-4,-6)
How many miles will Rosalind drive if she starts at pole A and drives around the entire border of the field?
What is 40 miles?