Use the cosine ratio: 5.437846722 meters
The proper distance of a ladder from a wall can be determined using the 4-to-1 rule: for every four feet of height you want to reach, the base of the ladder should be one foot away from the wall. This means if the top of the ladder is 12 feet high, it should be placed 3 feet away from the wall. This positioning helps ensure stability and safety while using the ladder. Always make sure the ladder is on a firm, level surface and positioned securely.
Using Pythagoras' theorem the length of the ladder is 20.248 feet
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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
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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.
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