Answer:
There are 1,000 millimeters in one meter.
A point doesn't have a slope. A line has. You need to find the slope of the line that these 2 points are on. The slope is
(the difference of the 'y' values) divided by (the difference of the 'x' values)
That appears to be zero. It's a horizontal line.
Perimeter = 2 * length + 2 * width
2 * length = perimeter - 2 * width
length = (perimeter / 2) - width
length = (34 / 2) -6.5
length = 10.5