62+82=36+64=100 and the squared route of 100 is 10
9
The best tip I've come to is that for every four feet of height you have to climb, move the base one foot away from the wall. Better still is to have someone foot the ladder, or to fasten the ladder with a rope, preferably near the top of the ladder to avoid the ladder sliding sideways.
You should normally have three rungs(steps) past the surface you are climbing to from the ladder. They are a foot apart on most ladders so 15 feet would be close. Add a foot since you have to angle the ladder appropriately(scope) so 16 feet or longer is safe. A 20 foot extension ladder would be a good choice.
About 6.708 m using Pythagoras' theorem
assuming the wall and ground make a 90 degree angle with one another, Pythagorean's Theorem states the ladder will go 8 feet up the wall.
13 feet
10,000 m
56
20
Assuming you mean "foot of the ladder": Sqrt(144 - 81) ie sqrt 63 = 7 feet 11¼ inches. If you mean what you wrote then zero distance!
3 FEET
12 feet.
6
12
1 i think other people feel free to change this
Answer your self dont know
It should be placed 2 ft from the wall