Answer:
-3
Step-by-step explanation:
Use slope formula to find the slope of the first road:
(y2 - y1) / (x2 - x1)
(1 - 5) / (-1 - 11)
-4 / -12
1 / 3
The slope of a line perpendicular to this line would just be the negative reciprocal of the slope:
-3 / 1 or just -3
Perimeter: 5 + 5 + 5 +5 = 20
area: 5 x 5 x 5 x 5 = 625
Answer: 3
Step-by-step explanation: