To find the perimeter of a polygon, we need to add up the lengths of all its sides.
The length of a side can be found using the distance formula, which is:
d = √[(x2 - x1)² + (y2 - y1)²]
Using this formula, we can find the lengths of the sides of triangle AMN:
d(MN) = √[(5 - 4)² + (-7 - 4)²] = √(1² + (-11)²) = √(1 + 121) = √122
d(NA) = √[(-6 - 5)² + (-6 - (-7))²] = √((-11)² + 1²) = √(121 + 1) = √122
d(AM) = √[(4 - (-6))² + (4 - (-6))²] = √(10² + 10²) = √200
So the perimeter of AMNO is:
P = d(MN) + d(NA) + d(AM) = √122 + √122 + √200 ≈ 24.3 (rounded to the nearest tenth)
Therefore, the perimeter of AMNO is approximately 24.3 units.