15
12 feet.
Using Pythagoras' theorem it is 20 feet
Using Pythagoras' theorem the the foot of the ladder should be 12 feet away from the base of the building.
13
Using Pythagoras' theorem the length of the ladder is 20.248 feet
10,000 m
12
The ladder is 7 foot up the wall if the ladder if the ladder is 3 ft away from wall.
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.
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.
9
12 feet.
Using Pythagoras' theorem it is 20 feet
Using Pythagoras' theorem the the foot of the ladder should be 12 feet away from the base of the building.
13
62+82=36+64=100 and the squared route of 100 is 10
Using Pythagoras' theorem the length of the ladder is 20.248 feet