Question 1120947
Draw this
the hypotenuse is the ladder's length or 10 feet.
The height of the wall is 8 feet.
The distance the ladder is from the wall at the bottom is 6 feet, because this is a 6-8-10 right triangle.  
The slope is 8/6 or 4/3, the sign being dependent upon which way one is looking at the ladder.
1 foot away from the wall, the height is 8-4/3 or 6 2/3 feet.  Yes, a person could pass under the ladder here.