15
The ladder is 7 foot up the wall if the ladder if the ladder is 3 ft away from wall.
The slope is 4 (no units), and the ladder is 16.492 feet long. (rounded)
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.
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.
Using Pythagoras' theorem the length of the base is 7 feet
This question is where you use the Pythagorean Theorem. Go to http://en.wikipdedia.org/ and search for Pythagorean Theoremif you don't already remember what it is, and good luck.
9.2
Use the cosine ratio: 5.437846722 meters
The ladder is 7 foot up the wall if the ladder if the ladder is 3 ft away from wall.
To safely use a ladder on a roof, follow these steps: Choose a sturdy ladder that is tall enough to reach the roof. Place the ladder on a flat surface and secure it at the top and bottom to prevent slipping. Use the 4-to-1 rule: for every 4 feet of height, move the base of the ladder 1 foot away from the wall. Climb the ladder facing towards it and maintain three points of contact at all times. Do not lean too far to either side while on the ladder. Have someone hold the ladder for extra stability if possible.
10,000 m
Using Pythagoras' theorem the length of the ladder is 20.248 feet
21
The slope is 4 (no units), and the ladder is 16.492 feet long. (rounded)
No. if the floor is smooth you must have friction between the ladder and the floor, or the ladder would just slide away. Technically you could do without friction between wall and ladder, but even that can be helpful in preventing the ladder from going sideways.
"A few meters away from our home" is not a correct grammar but the correct one is "Few meters away from our home."
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